计算复杂性的本质是理解什么可以被有效地计算的极限。
"The only limit to our realization of tomorrow will be our doubts of today."
释义:在遭受挫折、忍受屈辱的艰难时刻,一定要咬紧牙关,激励自己坚定志向。积蓄内心的力量,让自己的意志愈发坚韧,使志向得以长远发展,绝不因一时困境而退缩放弃。
People are not lazy. They simply have impotent goals - that is, goals that do not inspire them.