The alternation of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.

The only way to do great work is to love what you do.

出自先秦《荀子·大略》。说得到，也能做得到，这种人就是国家之宝。说明言行一致、身体力行的人才是治国安邦的有益人才。

The desire to be loved is perhaps the most deeply rooted of all our vanity.

朗兰兹纲领是对数学知识边界的挑战。