All human knowledge is from experience.
There are only two tragedies in life: one is not getting what one wants and the other is getting it.
生活里有两个悲剧:一个是没有得到我们想要的;另外一个是得到了。
The beauty of science lies in its ability to explain the natural world through observation and experimentation.
巨人倒下时,身体还是暖的。