Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers.
The personal is always political.
The beauty of mathematics only shows itself to more patient followers.
Success comes from focusing on what you can control and letting go of what you cannot.
释义：天道是要使盈者亏损而补偿不满者；地道也是要使盈者溢出而流向不盈的一方；鬼神的本性也是损害盈满者而福荫那些空虚者；而人的本性也是讨厌满盈者而喜好不满者。