Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job， buy the very best you can afford.

"The past is always tense, the future perfect."

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

我们对国家的愿景必须大胆而雄心勃勃。