Again, it is sometimes said that moral questions have been authoritatively settled by other methods; that we ought to accept this decision, and not to question it by any method of scientific inquiry; and that reason should give way to revelation on such matters. I hope before I have done to show just cause why we should pronounce on such teaching as this no light sentence of moral condemnation: first, because it is our duty to form those beliefs which are to guide our actions by the two scientific modes of inference, and by these alone; and, secondly, because the proposed mode of settling ethical questions by authority is contrary to the very nature of right and wrong.

Leaving this, then, for the present, I pass on to the most formidable objection that has been made to a scientific treatment of ethics. The objection is that the scientific method is not applicable to human action, because the rule of uniformity does not hold good. Whenever a man exercises his will, and makes a voluntary choice of one out of various possible courses, an event occurs whose relation to contiguous events cannot be included in a general statement applicable to all similar cases. There is something wholly capricious and disorderly, belonging to that moment only; and we have no right to conclude that if the circumstances were exactly repeated, and the man himself absolutely unaltered, he would choose the same course.

It is clear that if the doctrine here stated is true, the ground is really cut from under our feet, and we cannot deal with human action by the scientific method. I shall endeavor to show, moreover, that in this case, although we might still have a feeling of moral approbation or reprobation toward actions, yet we could not reasonably praise or blame men for their deeds, nor regard them as morally responsible. So that, if my contention is just, to deprive us of the scientific method is practically to deprive us of morals altogether. On both grounds, therefore, it is of the greatest importance that we should define our position in regard to this controversy; if, indeed, that can be called a controversy in which the practical belief of all mankind and the consent of nearly all serious writers are on one side.

Let us in the first place consider a little more closely the connection between conscience and responsibility. Words in common use, such as these two, have their meanings practically fixed before difficult controversies arise; but after the controversy has arisen each party gives that slight tinge to the meaning which best suits its own view of the question. Thus it appears to each that the common language obviously supports their own view, that this is the natural and primary view of the matter, and that the opponents are using words in a new meaning and wrestling them from their proper sense. Now this is just my position. I have endeavored so far to use all words in their common every-day sense, only making this as precise as I can; and, with two exceptions, of which due warning will be given, I shall do my best to continue this practice in future. I seem to myself to be talking the most obvious platitudes; but it must be remembered that those who take the opposite view will think I am perverting the English language.

There is a common meaning of the word ‘responsible,’ which though not the same as that of the phrase ‘morally responsible,’ may throw some light upon it. If we say of a book, ‘A is responsible for the preface and the first half, and B is responsible for the rest,’ we mean that A wrote the preface and the first half. If two people go into a shop and choose a blue silk dress together, it might be said that A was responsible for its being silk and B for its being blue. Before they chose, the dress was undetermined both in color and in material. A’s choice fixed the material, and then it was undetermined only in color. B’s choice fixed the color; and if we suppose that there were no more variable conditions (only one blue silk dress in the shop), the dress was then completely determined. In this sense of the word we say that a man is responsible for that part of an event which was undetermined when he was left out of account, and which became determined when he was taken account of. Suppose two narrow streets, one lying north and south, one east and west, and crossing one another. A man is put down where they cross, and has to walk. Then he must walk either north, south, east, or west, and he is not responsible for that; what he is responsible for is the choice of one of these four directions. May we not say in the present sense of the word that the external circumstances are responsible for the restriction on his choice? We should mean only that the fact of his going in one or other of the four directions was due to external circumstances, and not to him. Again, suppose I have a number of punches of various shapes, some square, some oblong, some oval, some round, and that I am going to punch a hole in a piece of paper. Where I shall punch the hole may be fixed by any kind of circumstances; but the shape of the hole depends on the punch I take. May we not say that the punch is responsible for the shape of the hole, but not for the position of it?

It may be said that this is not the whole of the meaning of the word ‘responsible,’ even in its loosest sense; that it ought never to be used except of a conscious agent. Still this is part of its meaning; if we regard an event as determined by a variety of circumstances, a man’s choice being among them, we say that he is responsible for just that choice which is left him by the other circumstances.

When we ask the practical question, ‘Who is responsible for so-and-so?’ we want to find out who is to be got at in order that so-and-so may be altered. If I want to change the shape of the hole I make in my paper, I must change my punch; but this will be of no use if I want to change the position of the hole. If I want the color of the dress changed from blue to green, it is B, and not A, that I must persuade.

We mean something more than this when we say that a man is morally responsible for an action. It seems to me that moral responsibility and conscience go together, both in regard to the man and in regard to the action. In order that a man may be morally responsible for an action, the man must have a conscience, and the action must be one in regard to which conscience is capable of acting as a motive, that is, the action must be capable of being right or wrong. If a child were left on a desert island and grew up wholly without a conscience, and then were brought among men, he would not be morally responsible for his actions until he had acquired a conscience by education. He would of course be responsible, in the sense just explained, for that part of them which was left undetermined by external circumstances, and if we wanted to alter his actions in these respects we should have to do it by altering him. But it would be useless and unreasonable to attempt to do this by means of praise or blame, the expression of moral approbation or disapprobation, until he had acquired a conscience which could be worked upon by such means.

It seems, then, that in order that a man may be morally responsible for an action, three things are necessary:—

1. He might have done something else; that is to say, the action was not wholly determined by external circumstances, and he is responsible only for the choice which was left him.