The truth is, the science of Nature has been already too long made only a work of the brain and the fancy: It is now high time that it should return to the plainness and soundness of observations on material and obvious things.

Always keep a written record of your trades. This will help you learn from your mistakes and successes.

The more you know, the more you realize you don't know.

没有循环和结构化变量的程序不值得编写。