A lake is something limited. Water is inexhaustible. A lake can contain only a definite amount of the infinite quantity of water; this is its peculiarity. In human life too the individual achieves significance through discrimination and the setting of limits. Therefore what concerns us here is the problem of clearly defining these discriminations, which are, so to speak, the backbone of morality. Unlimited possibilities are not suited to man; if they existed, his life would only dissolve in the boundless. To become strong, a man's life needs the limitations ordained by duty and voluntarily accepted. The individual attains significance as a free spirit only by surrounding himself with these limitations and by determining for himself what his duty is.