Man’s free will differs from every other force in that man is directly conscious of it, but in the eyes of reason it in no way differs from any other force. The forces of gravitation, electricity, or chemical affinity are only distinguished from one another in that they are differently defined by reason. Just so the force of man’s free will is distinguished by reason from the other forces of nature only by the definition reason gives it. Freedom, apart from necessity, that is, apart from the laws of reason that define it, differs in no way from gravitation, or heat, or the force that makes things grow; for reason, it is only a momentary undefinable sensation of life.