Take note if you find yourself wondering “Where is my good knife？ Or， where is my good pen？” That means you have bad ones. Get rid of those.
如果你发现自己在想 "咦，我的好刀呢？”或者“我的好笔在哪里？" 这意味着你有的是坏的东西。把坏的扔掉吧。
In the end, it is not the years in your life that count, but the life in your years.
"Computational learning theory provides a mathematical framework for understanding the capabilities and limitations of machine learning algorithms."
We are all stories in the end.
复杂性不是理解的障碍，而是需要克服的挑战。
If you are ready to give up everything else and study the whole history and background of the market and all the principal companies whose stocks are on the board as carefully as a medical student studies anatomy—if you can do all that and in addition you have the cool nerves of a gambler, the sixth sense of a clairvoyant and the courage of a lion, you have a ghost of a chance.
Whatever you're meant to do, do it now. The conditions are always impossible.