It follows that, the knowledge of the properties of the sexual organs is just as needful as that of the organs which generate mental activity; and that man should bestow upon the cultivation of both an equal share of care. He should realize that organs and impulses, found implanted in every human being, and that constitute a very essential part of his nature, aye, that, at certain periods of his life control him absolutely, must not be objects of secrecy, of false shame and utter ignorance. It follows, furthermore, that a knowledge of the physiology and anatomy of the sexual organs, together with their functions, should be as general among men and women as any other branch of knowledge. Equipped with an accurate knowledge of our physical make-up, we would look upon many a condition in life with eyes different from those we now do. The question of removing existing evils would then, of itself, force itself upon those before whom society, to-day, passes by in silence and solemn bashfulness, notwithstanding these evils command attention within the precincts of every family. In all other matters, knowledge is held a virtue, the worthiest and most beautiful aim of human endeavor--only not knowledge in such matters that are in closest relation with the essence and health of our own _Ego_, as well as the basis of all social development. Kant says: "Man and woman only jointly constitute the complete being: one sex supplements the other." Schopenhauer declares: "The sexual impulse is the fullest utterance of the will to live, hence it is the concentration of all will-power;" again: "The affirmative declaration of the will in favor of life is concentrated in the act of generation, and that is its most decisive expression." In accord therewith says Mainlaender: "The center of gravity of human life lies in the sexual instinct: it alone secures life to the individual, which is that which above all else it wants.... To nothing else does man devote greater earnestness than to the work of procreation, and for the care of none other does he compress and concentrate the intensity of his will so demonstratively as for the act of procreation." Finally, and before all of these, Buddha said: "The sexual instinct is sharper than the hook wild elephants are tamed with; it is hotter than flames; it is like an arrow, shot into the spirit of man."[58]