人才无定珍，器用无常道。
释义：人才没有固定不变的价值，器物没有一成不变的用处。
I would not dare to say that there is a direct relation between mathematics and madness, but there is no doubt that great mathematicians suffer from maniacal characteristics.
感官的界限不应由我们自身能力的狭隘范围来决定。
The foundation of every government is some principle or passion in the minds of the people.