To study the mind is to study adaptation in action; every thought is a tool for living.
到处卑躬屈膝,可笑你的头为什么有仇于天而又有恩于地而抬不起来?终日谋尽计算,问你的心为什么轻生命而重钱财?
The most dangerous poison is the feeling of achievement. The antidote is to think every evening what can be done better tomorrow.