Those who deny the action of cause and effect in the conduct of men as contradictory of freedom, cannot refer to physical or political liberty, since the absence of these does not involve the absence of cause and effect. The free will which is said to be peculiar to the human being and not possessed by the animals, is an absence of subjection to the impressions of the moment, and this has been regarded as an activity of pure reason. But, as Hoeffding says, the contest of the reason with the passions is really a contest between feelings combined with reflections of reason and other violent feelings that are combined with few thought-elements. This free will is the capacity of reflection gained by experience. It is not a negation of cause and effect, for the act of the will is determined by the feelings, thoughts, inclinations, which precede it; it may be determined by reflection as opposed to the impressions of the moment. The word "freedom" is also used to denote moral freedom, or the freedom from determination by immoral motives; in such case, however, moral motives determine. But it must be remembered that the natural law of cause and effect is not like a law in the sense of the political law; it is not something imposed from the outside. Natural laws are rules formed by men to express the regularity of events in one sentence; things do not obey the laws, but the laws are according to things. When we say: Gunpowder "must" explode when it comes in contact with a flame, the explosion is necessary; we do not mean that the gunpowder is compelled, under certain circumstances, to explode; it explodes of its own essential nature. "Necessity" designates, not a state of things, but a state of the understanding regarding them. The same is true of the words "possible" and "accidental." The accidental is the unintentional. The bullet which accidentally killed a man was not sent with the intention of killing him. Or "accident" is used of that with regard to which we are ignorant and cannot predict; the word does not, in this sense either, denote an absence of cause. Objectively, nothing is "possible"; either it is, or it is not. Great confusion is, however, caused by a want of clearness in the interpretation of the words "possible," "impossible," "necessary," etc., with regard to the will. When I say: "It is _possible_ for the good man to perform even the worst action, he _can_ perform it"; and: "It is not _possible_ for the good man to perform a bad act, he cannot do it"; I use the words "possible" and "can" in two quite different senses. The first sentence means: "Even the best man can perform the worst act _if he will_"; the second: "The good man never has the will; it follows from his nature that he does not possess it; it would be a self-contradiction to say that he has it." The human being can do this or that if he wills, provided no outer force opposes his will; but whether he wills or not depends upon his character. His will is not uncaused.