心理学必须植根于有机体为生存而斗争的现实中。
Psychology must be grounded in the reality of the organism's struggle to exist.
事实是，我们都能够做出可怕的事情。但我们也能表现出极大的善意。
The human being is essentially self-determining; he becomes what he wills himself to be.
The essence of mathematics lies in its freedom.