The true teacher defends his pupils against his own personal influence. He inspires self-distrust. He guides their eyes from himself to the spirit that quickens him. He will have no disciple.

I must study politics and war, tapestry and porcelain.

物理学和数学之间的界限并不像人们想象的那么清晰。

【释义】贤能的人处世，会根据时代的变化而调整自己的行为。