But there are habits of a second sort. In proportion as our experience enlarges, the subjects of voluntary action become more numerous. In this state of the human being, he soon comes to perceive a considerable similarity between situation and situation. In consequence he feels inclined to abridge the process of deliberation, and to act today conformably to the determination of yesterday. Thus the understanding fixes for itself resting places, is no longer a novice, and is not at the trouble continually to go back and revise the original reasons which determined it to a course of action.
Thus the man acquire habits from which it is very difficult to wean him, and which he obeys without being able to assign either to himself or others any explicit reason for his proceeding. This is the history of prepossession and prejudice.
Let us consider how much there is of voluntary, and how much of involuntary in this species of action. Let the instance be of a man going to church today. He has been accustomed, suppose, to a certain routine of this kind from his childhood. Most undoubtedly then, in performing this function today, his motive does not singly consist of inducements present to his understanding. His feelings are not of the same nature as those of a man who should be persuaded by a train of reasoning to perform that function for the first time in his life. His case is partly similar to that of a scholar who has gone through a course of geometry, and who now believes the truth of the propositions upon the testimony of his memory, though the proofs are by no means present to his understanding. Thus the person in question, is partly induced to go to church by reasons which once appeared sufficient to his understanding, and the effects of which remain, though the reasons are now forgotten, or at least are not continually recollected.
He goes partly for the sake of decorum, character, and to secure the good will of his neighbours. A part of his inducement also perhaps is that his parents accustomed him to go to church at first, from the mere force of authority, and that the omission of a habit to which we have been formed is apt to fit awkwardly and uneasily upon the human mind. Thus it happens that a man who should scrupulously examine his own conduct in going to church would find great difficulty in satisfying his mind as to the precise motive, or proportion contributed by different motives, which maintained his adherence to that practice.
It is probable however that, when he goes to church, he determines that this action is right, proper or expedient, referring for the reasons which prove this rectitude or expediency to the complex impression which remains in his mind, from the inducements that at different times inclined him to that practice. It is still more reasonable to believe that, when he sets out, there is an express volition, foresight or apprehended motive inducing him to that particular action, and that he proceeds in such a direction because he knows it leads to the church. Now, so much of this action as proceeds from actually existing foresight and apprehended motive, it is proper to call perfectly voluntary. So much as proceeds upon a motive, out of sight, and the operation of which depends upon habit, is imperfectly voluntary.
This sort of habit however must be admitted to retain something of the nature of voluntariness for two reasons. First, it proceeds upon judgement, or apprehended motives, though the reasons of that judgement be out of sight and forgotten; at the time the individual performed the first action of the kind, his proceeding was perfectly voluntary. Secondly, the custom of language authorizes us in denominating every action as in some degree voluntary which a volition, foresight or apprehended motive in contrary direction might have prevented from taking place.
Perhaps no action of a man arrived at years of maturity is, in the sense above defined, perfectly voluntary; as there is no demonstration in the higher branches of the mathematics which contains the whole of its proof within itself, and does not depend upon former propositions, the proofs of which are not present to the mind of the learner. The subtlety of the human mind in this respect is incredible. Many single actions, if carefully analysed and traced to their remotest source, would be found to be the complex result of different motives, to the amount perhaps of some hundreds.
In the meantime it is obvious to remark that the perfection of the human character consists in approaching as nearly as possible to the perfectly voluntary state. We ought to be upon all occasions prepared to render a reason of our actions. We should remove ourselves to the furthest distance from the state of mere inanimate machines, acted upon by causes of which they have no understanding. We should be cautious of thinking it a sufficient reason for an action that we are accustomed to perform it, and that we once thought it right. The human understanding has so powerful a tendency to improvement that it is more than probable that, in many instances, the arguments which once appeared to us sufficient would upon re-examination appear inadequate and futile. We should therefore subject them to perpetual revisal. In our speculative opinions and our practical principles we should never consider the book of enquiry as shut. We should accustom ourselves not to forget the reasons that produced our determination, but be ready upon all occasions clearly to announce and fully to enumerate them.
Having thus explained the nature of human actions, involuntary, imperfectly voluntary and voluntary, let us consider how far this explanation affects the doctrine of the present chapter. Now it should seem that the great practical political principle remains as entire as ever. Still volition and foresight, in their strict and accurate construction, are inseparable.