To overcome the anxieties and depressions of contemporary life, individuals must become independent of the social environment to the degree that they no longer respond exclusively in terms of its rewards and punishments.

地主的利益总是与社会中其他阶级的利益相对立。

The Romans would never have found time to conquer the world if they had been obliged first to learn Latin.

Challenges are what make life interesting. Overcoming them is what makes life meaningful.