数学中最重要的是理解概念，而不仅仅是记忆公式。
The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
我不喜欢欠下人情，这样会压逼著我，令我觉得自己是个奴隶。我宁愿自己处理自己的事，不用依靠别人，能够完全独立。
世界上有开朗的悲观主义者吗？我就是这样的人。
The most exciting breakthroughs of the 21st century will not occur because of technology but because of an expanding concept of what it means to be human.