有些无限比其他无限更大。
"Some infinities are bigger than other infinities."
Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.
The greatest prison people live in is the fear of what other people think.
艺术作品是神圣的痕迹。
智力是当你不确定该做什么时所使用的东西。
数学的研究就像空气或重力——它无处不在，你看不到它，但你知道它在那里。