Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.

The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

不成熟的爱说：'我爱你因为我需要你。'成熟的爱说：'我需要你因为我爱你。'

记忆是一条咬自己尾巴的狗。

决定我们是否富有的，不是我们拥有的东西，而是我们没有也行的东西。

传统观念中影响人一生的五大因素。

数学不是关于数字、方程、计算或算法的：它是关于理解的。