数学家的直觉和严谨的证明同样重要。
A mathematician's intuition is as important as rigorous proof.
La literatura no es otra cosa que un sueño dirigido.
最强者也不能总是强大得足以永远作主人,除非他能把力量转化为权利和服从的义务。
You build your life around what you fear, and then you spend your life being afraid.
Every scientific discovery should be measured by its contribution to human welfare.