we believe at the moment that they will be completely effectual: we will to do something hours or days hence with the same confidence with which we will to do something immediately. But on reflection, no one, I think, will maintain that in such cases the future act appears to be in his power in the same sense as a choice of alternatives that takes effect immediately. Not only does continual experience show us that such resolutions as to the future have a limited and too frequently an inadequate effect: but the common belief is really inconsistent with the very doctrine of Free Will that is thought to justify it: for if by a present volition I can fully determine an action that is to take place some hours hence, when the time comes to do that act I shall find myself no longer free. We must therefore accept the conclusion that each such resolve has only a limited effect: and that we cannot know when making it how far this effect will exhibit itself in the performance of the act resolved upon. At the same time it can hardly be denied that such resolves sometimes succeed in breaking old habits: and even when they fail to do this, they often substitute a painful struggle for smooth and easy indulgence. Hence it is reasonable to suppose that they always produce some effect in this direction; whether they operate by causing new motives to present themselves on the side of reason, when the time of inner conflict arrives; or whether they directly weaken the impulsive force of habit in the same manner as an actual breach of custom does, though in an inferior degree.[70]