As the mission of Christ was rendered necessary by the fall of man, so the first dark intimation of Him was given immediately after the fall. It is found in the sentence of punishment which was passed upon the tempter. Gen. iii. 14, 15. A correct understanding of it, however, can be obtained only after we have ascertained who the tempter was.

It is, in the first place, unquestionable that a real serpent was engaged in the temptation; so that the opinion of those who maintain that the serpent is only a symbolical signification of the evil spirit, cannot be admitted.[1] There must be unity and uniformity in the interpretation of a connected passage. But the allegorical interpretation of the whole is rendered impossible by the following considerations:—The passage stands in a book of a strictly historical character; it is connected with what follows, where the history of the same pair who, in this section appear as actors, is carried forward; the condition of mankind announced to them in this passage as a punishment, actually exists; there is the absence of every indication from which it might be inferred that the author intended to write an allegory, and not a history; there exist various passages of the New Testament (e.g., 2 Cor. xi. 3; 1 Tim. ii. 13, 14; Rom. v. 12), in which the context of the passage before us is referred to as a real historical fact;—and there are the embarrassment, ambiguity, and arbitrariness shown by the allegorical interpreters whenever they attempt to exhibit the truth intended to be conveyed; whereas perspicuity is a characteristic essential to an allegory.—The subtlety of the serpent, pointed out in chap. iii. 1, is a natural attribute of that animal; and the comparison, in this respect, of the serpent with the other beasts, clearly indicates that a real serpent is spoken of. To such an one the denunciation of the punishment must necessarily, in the first instance, be referred. The last two reasons also exclude the opinion that Satan assumed merely the semblance of a serpent.

The serpent itself cannot, however, have acted independently; it can only have served as an instrument to the evil spirit. The position which the serpent would occupy, in the event of our considering it as the self-acting, independent seducer, would be in direct contradiction to the position assigned to the animal creation throughout Holy Scripture—especially in the history of the creation—and would break down the limits which, according to it, separate man and beast. By such an assumption we should be transferred from the Israelitish territory—which is distinguished by the most sharply defined limitations of the respective spheres of God, angels, men, and beasts—to the heathenish, were these are all mixed up together, and where all the distinctions disappear in the confusion. Such a fact would be altogether isolated and without a parallel in Holy Scripture. Nor is it legitimate to adduce the argument, that the conditions and circumstances of the paradisaic period were different from those of subsequent times. It is indeed true, according to the statements contained in the Mosaic account itself, that the animal world of that time was different from that of the present; but whatever, and how great soever, this difference may have been, it had no reference to the fundamental relation of the beasts; and hence we cannot, from it, explain the high intellectual powers with which the serpent appears endowed, and by the abuse of which it succeeded in seducing men. Man, as the only being on earth created in the likeness and image of God, is, in Gen. i., strictly distinguished from all other living beings, and invested with the dominion over them. Into man alone did God breathe the breath of life (ii. 7); and, according to ii. 19, 20, man recognises the great gulf which is fixed betwixt him and the world of beasts. This gulf would be entirely filled up, the serpent would altogether step beyond the sphere appointed by the Creator to the world of beasts, if there were no background in Gen. iii. 1-5. Further, The words of the serpent are an effect of wickedness: they raise in man doubts as to the love of God, in order thereby to seduce him to apostasy, and bring about the execution upon him of the fearful threatening, "On the day that thou eatest thereof thou shalt surely die." The serpent does not stand in the truth; it speaks lies; it represents to man as the highest good, that which in truth is the highest evil. Such language cannot proceed spontaneously from a being, the creation of which falls within the work of the six days during which the whole animal creation was made. For everything created within this space of time was good, according to the remark constantly repeated in the history of creation. To this we must add the nature of the curse itself, in which a higher reference to an invisible author of the temptation shines clearly through the lower reference to the visible one; and, further, the remark in iii. 1, "Now the serpent was more subtle," etc., evidently points to something beyond the natural subtlety of the serpent, as the result of which the subsequent words cannot be understood, but behind which we may discover the intimation: let him who reads, understand.

The view, that the serpent was the sole independent agent in this transaction, is thus refuted by internal reasons. It is set aside by the testimony of tradition also. It was an opinion universally prevalent among the Jews, that Satan himself had been active in the temptation of the first man. It is found in Philo; and in the Book of Wisdom, ii. 24, it is said, "By the envy of Satan, death came into the world." In the later Jewish writings, Sammael, the head of the evil spirits, is called הנחש הקדמוני "the old serpent," or simply נחש "serpent," because in the form of a serpent he tempted Eve. (See the passage in Eisenmenger's entdecktes Judenthum i. S. 822.) In the sacred books of the Persians also, the agency of Satan in the fall of our first parents is taught. According to the Zendavesta (ed. by Kleuker, Th. 3, S. 84, 85), the first men, Meshia and Meshianeh, were created by God in a state of purity and goodness, and destined for happiness, on condition of humility of heart, obedience to the requirements of the law, and purity in thoughts, words, and actions. But they were deceived by Ahriman, "this mischievous one who from the beginning sought only to deceive, were induced to rebel against God, and forfeited their happiness by the eating of fruits." According to the same book (Th. iii. S. 62), Ahriman in the form of a serpent springs down from heaven to earth; and another evil spirit is called (Th. ii. S. 217) the serpent—Dew. (Compare Rhode, die heilige Sage des Zendvolkes, S. 392.) These facts prove that at the time when the Persian religion received Jewish elements (compare Stuhr, die Religionssysteme des Orientes, S. 373), and hence, soon after the captivity, the doctrine of Satan's agency in the temptation of our first parents was prevalent among the Jews.

But of decisive weight upon this point is the evidence furnished by the New Testament. We must here above all consider the important testimony supplied by the fact of the history of the first and second Adam being parallel (Rom. v. 12 sqq.; 1 Cor. xv. 45 sqq.),—a testimony, the weight and importance of which have, in modern times, been again pointed out by Hahn in his Dogmatik. The necessity of Christ's temptation by the prince of this world, in order that He, by His firm resistance, might deprive him of his dominion over mankind, indicates that Adam was assailed by the same tempter, and, by being overcome, laid the foundation of that dominion.

Among the express verbal testimonies of the New Testament, we must first consider the declarations of the Lord Himself; and among these the passage John viii. 44 requires, above all, to be examined. In that passage the Lord says: ὑμεῖς ἐκ τοῦ πατρὸς τοῦ διαβόλου ἐστὲ, καὶ τὰς ἐπιθυμίας τοῦ πατρὸς ὑμῶν θέλετε ποιεῖν. Ἑκεῖνος ἀνθρωποκτόνος ἦν ἀπ᾽ ἀρχῆς, καὶ ἐν τῆ ἀληθείᾳ οὐχ ἕστηκεν· ὅτι οὐκ ἔστιν ἀλήθεια ἐν αὐτῷ. Ὅταν λαλῇ τὸ ψεῦδος, ἐκ τῶν ἰδίων λαλεῖ· ὅτι ψεύστης ἐστὶ καὶ ὁ πατὴρ αὐτοῦ. There is, indeed, an element of truth in the opinion, that Satan is in this passage called the murderer of men from the beginning, with reference to the murder by Cain—an opinion lately brought forward again by Nitzsch, Lücke, and others. This is evident from a comparison of 1 John iii. 12, 15, and of Rev. xii. 3. (See my commentary on this passage.) Moreover, the words in ver. 40, "Ye seek to kill Me," have a more direct parallelism in Cain's murder of his brother, than in the death which Satan brought upon our first parents; although it is altogether wrong to maintain, as Lücke does, that Satan at that time committed only a spiritual murder, which could not have come under notice. Bodily death also came upon mankind through the temptation. (Compare Gen. ii. 17, iii. 19; Wisd. ii. 24; Rom. v. 12.) But when the reference to Cain's slaying his brother is brought forward as the sole, or even as the principal one, we must absolutely reject it. Cain's murder of his brother comes into consideration only as an effect of the evil principle which was introduced into human nature by the first temptation; as, indeed, it appears in the book of Genesis itself as the fruit of the poisonous tree, the planting of which is detailed in chap. iii. The same murderous spirit which impelled Satan to bring man under the dominion of death by the lie, "Ye shall not surely die," was busy in Cain also, and seduced him to slay his pious brother. The following reasons forbid an exclusive reference to the deed of Cain:—1. The murdering of man by Satan is brought into the closest connection with his lie. In connection with Cain's deed, however, there was not even the appearance of falsehood; while, in the case before us, lies, false and deceitful promises of high blessings to be attained, and the raising of suspicions against God, were the very means by which he seduced man, and brought him under the power of sin. The words of Jesus, when they are understood according to their simple meaning, carry us back to an event in the primitive times, in which murder and the spirit of falsehood went hand in hand. 2. The co-operation of Satan in Cain's deed is not expressly mentioned in Genesis. That there was any such we can with certainty infer, only if this event be viewed in close connection with what Satan did against our first parents,—if, behind the serpent, Satan be concealed. Whensoever Jesus has to deal with Jews, He does not teach any mysterious doctrines, but makes an open appeal to the events narrated in Scripture. 3. The words, "Ye are of your father the devil," point to the seed of the serpent spoken of in Gen. iii. 15. 4. The words, "From the beginning," direct to an event which happened at the first beginnings of mankind, and in which our first parents took a part. Whatever this may be, the event in question must be the first in which the devil manifested himself as the murderer of man. Now, as by the Jews of that time the temptation of the first man, in consequence of which death entered the world, was attributed to sin—and this appears not only from what has been already said, but also from a passage in the Sohar Chadash, referred to by Tholuck, in which the wicked are called "The children of the old serpent which has slain Adam and all who are descended from him"—it is evident that, by "the murderer of men from the beginning," Jesus can mean only the first tempter of men. That the words, "from the beginning," refer to the fall of the first man, is also clearly shown by the parallel passages 1 John iii. 8, and Rev. xii. 9, xx. 2. 5. Jesus says: Satan stands not in the truth, does not move in its element, because there is no truth in him. This points to a well-known event, in which Satan displayed his lying nature; and such is found only in the account of man's fall. 6. Jesus calls Satan not only a liar, but, by way of emphasis, He designates him as the father of lies. But Satan can be designated thus, only with reference to a lie of his which is charged against him by Scripture, and which preceded all lies on earth. Now that is the lie of which we have an account in Gen. iii. 4, 5. The words, "and the father of it," correspond with the words, "from the beginning."

Another declaration of our Lord is found in St Matthew xiii. 38: τὰ δὲ ζιζάνιά εἰσιν οἱ υἱοὶ τοῦ πονηροῦ (i.e., mali, masculinum, according to Bengel), compared with ver. 39: ὁ δὲ ἐχθρὸς ὁ σπείρας αὐτά ἐστιν ὁ διάβολος. The children of the wicked one, or of the devil, who are spoken of in this passage, are the seed of the serpent who is mentioned in Gen. iii. 15, and to whom allusion is made in the words ὁ σπείρας αὐτα also. Less incontrovertible is the passage in St Matthew xxiii. 33, where the Lord addressed the Pharisees as ὄφεις, γεννήματα ἐχιδνῶν. (Compare Matt. xii. 34, iii. 7.) Olshausen, in his commentary on Matt. iii. 7, gives it as his opinion that the serpent designates the diabolic nature. But, according to Matt. xii. 34, the point of comparison is only the wickedness (πονηροὶ ὄντες), and it is quite sufficient to refer it to Ps. cxl. 4, where David says of the future enemies of his dynasty and family foreseen by him, "They have sharpened their tongues like a serpent; adders' poison is under their lips" (compare also Ps. lviii. 5; Deut. xxxii. 33; Isa. lix. 5),—a passage to which special allusion is made in the words, πῶς δύνασθε ἀγαθὰ λαλεῖν, Matt. xii. 34, and in the connection of serpents with vipers, which would be strange when referred to the history of the fall of the first man.

Let us now turn from the Lord to His disciples. Just as is done in the account of the transaction itself, Paul, in 2 Cor. xi. 3 (ὡς ὁ ὄφις Εὔαν ἐξηπάτησεν ἐν τῇ πανουργίᾳ αὐτοῦ), places the invisible cause of the temptation in the background, and speaks of the visible one only. But that behind the serpent he beholds Satan, appears immediately from ver. 14 and 15: Καὶ οὐ θαυμαστόν· αὐτὸς γὰρ ὁ Σατανᾶς μετασχηματίζεται εἰς ἄγγελον φωτός. Οὐ μέγα οὖν εἰ καὶ οἱ διάκονοι αὐτοῦ μετασχηματίζονται ὡς διάκονοι δικαιοσύνης, where the μετασχηματίζεται is explained by Bengel: "Transformat se: Præsens, i.e., solet se transformare. Fecit id jam in Paradiso." The Apostle alludes to an event narrated in Scripture, where Satan shows himself in this character. But such an occurrence is not found anywhere else than in Gen. iii. 4, 5, the only passage where Satan represents himself as the friend and saviour of men. We have here the explanation of the ἐξηπάτησεν in ver. 3.—In Rom. xvi. 20, the words, Ὁ δὲ Θεὸς τῆς εἰρήνης συντρίψει τὸν Σατανᾶν ὑπὸ τοὺς πόδας ὑμῶν, contain an allusion to Gen. iii. 15, too plain to be mistaken. The Apostle recognises, in the promise of the victory over the serpent given there, a pledge of the victory over Satan. The words of Paul to Elymas in Acts xiii. 10, "O thou child of the devil," likewise contain a distinct reference to that which, in the history of man's fall, is written concerning the serpent. In the charge of subtlety, mischief, and enmity to all righteousness which he brings against him, there is an evident allusion to Genesis.

In 1 John iii. 8, Ὁ ποιῶν τὴν ἁμαρτίαν, ἐκ τοῦ διαβόλου ἐστίν· ὅτι ἀπ᾽ ἀρχῆς ὁ διάβολος ἁμαρτάνει, allusion is made to a most heinous sin committed by Satan at the first beginnings of the human race. But of such a sin there is no account, unless Satan be concealed behind the serpent.—In Rev. xii. 9 (comp. xx. 2), Satan is called the great dragon, and the old serpent; the last of which designations refers to the passage now under consideration.

The agency of Satan in the fall of man has been controverted, on the plea that, had such been in operation, it ought to have been mentioned. But the absence of any such mention may be explained on the ground that it is not the intention of the holy writers to give any information respecting the existence of the devil, but rather to give an account of his real manifestation, to which, afterwards, the doctrine connected itself. The judgment of the reader should not, as it were, be anticipated. The simple fact is communicated to him, in order that, from it, he may form his own opinion.