The truth is, we must reason about cause and effect as they appear to us; and whether time be an illusion or not, we must, in all our reasonings, conceive of cause and effect as conjoined in what we call time, or we cannot reason at all. According to the younger Edwards, the act of creation, not the mere purpose to create, but the real causative act of creation, existed in the divine mind from all eternity. Why then did the world spring up and come into existence at one point of time rather than another? How happened it, that so many ages rolled away, and this mighty causative act produced no effect? In view of such a case, how could the author have said, as he frequently does, that a cause necessarily implies its effect? How can this be, if a causative act of the Almighty may exist, and yet, for millions of ages, its omnipotent energy produce no effect? Indeed, such a doctrine destroys all our notions of cause and effect; it overthrows “the great principle of common sense” that cause and effect necessarily imply each other; and involves all our reasoning from cause to effect, and vice versa, in the utmost perplexity and confusion. It throws clouds and darkness over the whole field of inquiry.
Since the time of Dr. Samuel Clarke, it has been frequently objected to the scheme of moral necessity, that it is involved in the great absurdity of an infinite series of causes. President Edwards urged this objection against the doctrine of the self-determining power; he did not perceive that it lay against his own scheme of the motive-determining power; and hence, he has not even attempted to answer it. This was reserved for the younger Edwards; and although he has deservedly ranked high as a logician, I cannot but regard his attempt to answer the objection in question, as one of the most remarkable abortions in the history of philosophy.
[SECTION VI.]
OF THE MAXIM THAT EVERY EFFECT MUST HAVE A CAUSE.
In a former section, I referred to some of the false assumptions which have been incautiously conceded to the necessitarian, and in which he has laid the foundations of his system; but I have not, as yet, alluded to the argument or deduction in which he is accustomed to triumph. This argument, strange as it may seem, is a deduction, not from any principle or general fact which has been ascertained by observation or experience, but from a self-evident and universal truth.
That every effect must have a cause, is the maxim upon which the necessitarian takes his stand, and from which he delights to draw his favourite conclusion. It may be well, therefore, to examine the argument which has been so frequently erected upon the maxim in question. Although from various considerations, it has been very justly concluded, that there is somewhere a lurking fallacy in the argument, yet it has not been precisely shown where the fallacy lies. Suspicion has been thrown over it: nay, abundant reason has been shown why it should be rejected; but yet the fallacy of it should be dragged from the place of its concealment, and laid open in a clear light, so as to render it apparent to every eye. If it is a sophism, it certainly can be exposed, and it should be done.
In order to do this, it will be necessary to consider the nature and use of the maxim, that every effect must have a cause. I am aware, that no necessitarian of the present day, would choose to express this maxim as I have expressed it; for in such a form Mr. Hume has shown that it contains no information, and is indeed a most insignificant proposition. And, in truth, what does it amount to? Cause and effect are correlative terms; and when we speak of an effect, we mean something that is produced by a cause; and hence, the famous proposition, that every effect has a cause, amounts only to this, that every effect is an effect!
After Mr. Hume had caused the subject to be viewed in this light, the usual mode of expression was dropped; and it has now become the common practice to say, that there is no change in nature without a cause. But I do not see how this mends the matter in the least: it may disguise, but it does not alter the nature or real import of the maxim in question. For when it is said that every change has a cause, it is evident that a change is conceived of under the idea of an effect. It is supposed to be produced by a cause, and therefore it must be considered as an effect; and if the idea remains precisely the same, I do not see that giving it a new name, can possibly make any difference in the meaning of the proposition.
The maxim, that every effect must have a cause, is a self-evident and universal proposition. Its truth is involved in the very definition of the terms of which it is composed. In this respect it is like the axioms of geometry. When it is said, for example, that “the whole is equal to the sum of the parts,” we at once perceive the truth of the axiom; because the “whole” is merely another name for “the sum of the parts.” It is intuitively certain that they are equal, because they are but different expressions of the same thing. So, likewise, when it is affirmed, that every effect or every change in nature has a cause, we instantly perceive the truth of the proposition; inasmuch as an effect is that which is produced by a cause. The very idea of an effect implies its relation to a cause; and to say, that it has one, is only to say, that an effect is an effect. For if it were not produced by a cause, it would not be an effect.
The maxim under consideration is as unquestionably true as any axiom in Euclid. It does not depend for the evidence of its truth upon observation, or experience, or reasoning; it carries its own evidence along with it. No sooner are the terms in which it is expressed understood, than it rivets irresistible conviction on the mind. It is a fundamental law of belief; and it is impossible for the imagination of man to conceive, that an effect, or that which is produced by a cause, should be without a cause. And it were just as idle an employment of one’s time, to undertake to prove such a proposition, as it would be to attempt to refute it.