清白的良心是一个温柔的枕头。
唯一存在的限制是你心中的限制。
We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.
La verdadera literatura no tiene fronteras, no conoce límites.
The future of medicine lies in understanding the molecular basis of disease.
Every mathematical problem is a puzzle waiting to be solved, and every solution is a step towards greater understanding.
如果你没有至少90%的时间失败，那么你的目标还不够高。
Your most unhappy customers are your greatest source of learning.