我们不要害怕犯错，因为只有通过犯错我们才能学习和进步。

Make it a rule never to give a child a book you would not read yourself.

寻求统一的物理理论是我们时代最伟大的智力冒险之一。

My expectations were reduced to zero when I was 21. Everything since then has been a bonus.

What we think, we become.