In conclusion we might say that there are two principal mentalities, of which one may be called a living mind and the other a dead mind. A living mind will show its life by its creative and perceptive quality. The pleasure that a man derives from a clear mind and a living mentality is a pleasure that cannot be compared with the pleasures that belong to this earth. A brilliant intellectuality imparts the pleasure of flying in the air, it lifts one above the earth. The thinker is like a bird that flies in the air compared with the man who is like an animal that stands on its four legs; and the joy of the bird that flies in the air is beyond comparison with the pleasure of the animal that walks on the earth.