Man can be ‘good and evil’ in his actions, reasonable and unreasonable— not to say, insane: this is his liberty. Hence his responsibility, which is born of this liberty. There can be no liberty without responsibility.

The question: is Man rational in his actions? cannot be answered by a simple ‘yes’: that some of his actions are rational is proved by the very fact of our existence; that not all of these actions are rational is proved by our present situation. On the other hand, if we do not perish, this is no proof of Man's rationality. Nor is it proved by the evolution of all creation, which undoubtedly moves from low to high. But it is not difficult to see that of all living beings Man alone is capable of acting rationally. Where Man's reason does not reach, there rules the law of selection. This latter prevails, likewise, wherever Man acts irrationally. Out of a senseless ‘urge to be’-as Schopenhauer calls it-that being asserts himself who enjoys some kind of primacy, who is superior in no matter what sphere-whether by his force, velocity, protective colouring, or any other way, it does not matter, except in the individual case.