The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
数学的本质不是使简单的事情复杂化，而是使复杂的事情简单化。
True freedom is not about doing what you want, but about not doing what you don't want to do.
一年规划，没有比种植五谷更好的；十年规划，没有比种植树木更好的；终身规划，没有比培养人才更好的。
灵魂被其思想的颜色所染色。