我们在二十多岁时做出的选择是我们将领导的生活的基础。

True leadership means making tough decisions today for a better tomorrow.

The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.

Don't watch the clock; do what it does. Keep going.

The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.