Man acquires at birth, through heredity, a biological constitution which we must consider fixed and unalterable, including the natural urges which are characteristic of the human species.

• 人在出生时，通过遗传已得到了一种生物学上的素质，我们应当把它看作是固定的和不变的。这种素质包括那些为人类特征的自然冲动。