我正充实地生活着,不会浪费任何时间。
Psychology must be a purely descriptive science.
In mathematics, the art of proposing a question must be held of higher value than solving it.
让人们保持被动和顺从的聪明方法是严格限制可接受意见的范围,但在该范围内允许非常活跃的辩论。
Fear is a kind of faith.