科学是一个微分方程。宗教是一个边界条件。

The act of writing is an act of courage, to face the truths within and around us.

四勿：“非礼勿视，非礼勿听，非礼勿言，非礼勿动。”四端：“恻隐之心，仁之端也；羞恶之心，义之端也；辞让之心，礼之端也；是非之心，智之端也。”颜渊的“四勿”，要牢记心里；下工夫闲静存诚，克服外部的干扰以修养心性；孟子的“四端”，要尽力扩充，下工夫格物致知，由近及远，推己及人。

Creativity in science is as important as technical skill.

The key to successful investing is to have a long-term perspective and to stick to your investment plan.

Teamwork is the key to the success of the enterprise. Only by uniting as one can we overcome difficulties and achieve common goals.

里氏替换原则是面向对象编程中的一个基本概念，确保派生类可以替代其基类使用，而不会改变程序的正确性。