In every person, there is an abyss. Sometimes you look into it, and sometimes you don’t.

在野外，没有捷径。你必须为每一步付出努力。

实现明天理想的唯一障碍是今天的疑虑。

The healthy social life is found when in the mirror of each human soul the whole community finds its reflection, and when in the community the virtue of each one is living.

The most beautiful thing in mathematics is the simplicity of the ideas behind the complexity.

最好的领导者是那些最热衷于让比自己更聪明的人围绕在身边的人。