Rich bachelors should be heavily taxed. It is not fair that some men should be happier than others.

长时间与计算机接触会使数学家变成文员，反之亦然。

Happiness requires both pleasure and purpose - neither alone is sufficient.

年轻人并不堕落；他们只有在成年人已经堕落时才会被宠坏。

经济的活力在于其持续适应和创新的能力。