"Books are the quietest and most constant of friends."
The most important part of teaching is to teach what it is to know.
對黑洞的研究將我們帶到了理解的邊緣，在那里已知的物理定律失效，新的理論必須出現(xiàn)。
藝術(shù)是我唯一感到自由的地方。