Moreover Bahya is the first, he tells us, among the post-Talmudical writers, to treat systematically and ex professo this branch of our religious duties. When I looked, he says, into the works composed by the early writers after the Talmud on the commandments, I found that their writings can be classified under three heads. First, exposition of the Torah and the Prophets, like the grammatical and lexicographical treatises of Ibn Janah, or the exegetical works of Saadia. Second, brief compilations of precepts, like the works of Hefez ben Yazliah and the responsa of some geonim. Third, works of a philosophico-apologetic character, like those of Saadia, Al Mukammas and others, whose purpose it was to present in an acceptable manner the doctrines of the Torah, to prove them by logical demonstration, and to refute the criticisms and erroneous views of unbelievers. But I have not seen any book dealing with the "hidden wisdom."[110]
Here we see clearly the purpose of Bahya. It is not the rationalization of Jewish dogma that he is interested in, nor the reconciliation of religion and philosophy. It is the purification of religion itself from within which he seeks to accomplish. Sincerity and consistency in our words and our thoughts, so far as the service of God is concerned, is the fundamental requirement and essential value of the duties of the heart. To be sure this cannot be attained without intelligence. The knowledge of God and of his unity is a prerequisite for a proper understanding and an adequate appreciation of our religious duties. Philosophy therefore becomes a necessity in the interest of a purer and truer religion, without reference to the dangers threatening it from without.
Having found, he continues in the introduction to the "Duties of the Hearts," that all the three sources, reason, Bible and tradition, command this branch of our religious duties, I tried to think about them and to learn them, being led from one topic to another until the subject became so large that I feared I could not contain it all in my memory. I then determined to write the subject down systematically in a book for my own benefit as well as for the benefit of others. But I hesitated about writing it on account of my limitations, the difficulty of the subject and my limited knowledge of Arabic, the language in which I intended writing it because the majority of our people are best familiar with it. But I thought better of it and realized that it was my duty to do what I could even if it was not perfect; that I must not yield to the argument springing from a love of ease and disinclination to effort; for if everyone were to abstain from doing a small good because he cannot do as much as he would like, nothing would ever be done at all.
Having decided to compose the work, he continues, I divided the subject into ten fundamental principles, and devoted a section of the book to each principle. I endeavored to write in a plain and easy style, omitting difficult expressions, technical terms and demonstrations in the manner of the dialecticians. I had to make an exception in the first section dealing with the existence and unity of God, where the sublet of the subject required the employment of logical and mathematical proofs. For the rest I made use of comparisons or similes, adduced support from the Bible and tradition, and also quoted the sages of other nations.[111]
We have already seen in the introduction that Bahya was indebted for his ideas to the ascetic and Sufic literature of the Arabs, and Yahuda, who is the authority in this matter of Bahya's sources, has shown recently that among the quotations of the wise men of other nations in Bahya's work are such as are attributed by the Arabs to Jesus and the gospels, to Mohammed and his companions, to the early caliphs, in particular the caliph Ali, to Mohammedan ascetics and Sufis.[112]
In selecting the ten general and inclusive principles, Bahya lays down as the first and most fundamental the doctrine of the deity, or as it is called in the works of the Kalam, the Unity. As God is a true unity, being neither substance nor accident, and our thought cannot grasp anything except substance or accident, it follows that we cannot know God as he is in himself, and that we can get a conception of him and of his existence from his creatures only. The second section is therefore devoted to an examination of creation. Then follow in order sections treating of the service of God, trust in God, action for the sake of God alone, submission to God, repentance, self-examination, separation from the pleasures of the world, love of God.
In his discussion of the unity of God, Bahya follows the same method as Saadia, and the Kalam generally, i. e., he first proves that the world must have been created; hence there must be a creator, and this is followed by a demonstration of God's unity. The particular arguments, too, are for the most part the same, as we shall see, though differently expressed and in a different order. The important addition in Bahya is his distinction between God's unity and other unities, which is not found so strictly formulated in any of his predecessors, and goes back to Pseudo-Pythagorean sources in Arabian literature of Neo-Platonic origin.
In order to prove that there is a creator who created the world out of nothing we assume three principles. First, nothing can make itself. Second, principles are finite in number, hence there must be a first before which there is no other. Third, every composite is "new," i. e., came to be in time, and did not exist from eternity.
Making use of these principles, which will be proved later, we proceed as follows: The world is composite in all its parts. Sky, earth, stars and man form a sort of house which the latter manages. Plants and animals are composed of the four elements, fire, air, water, earth. The elements again are composed of matter and form, or substance and accident. Their matter is the primitive "hyle," and their form is the primitive form, which is the root of all forms, essential as well as accidental. It is clear therefore that the world is composite, and hence, according to the third principle, had its origin in time. As, according to the first principle, a thing cannot make itself, it must have been made by some one. But as, in accordance with the second principle, the number of causes cannot be infinite, we must finally reach a first cause of the world before which there is no other, and this first made the world out of nothing.
Before criticising this proof, from which Bahya infers more than is legitimate, we must prove the three original assumptions.