The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
History is not the past. It is the method we have evolved of organizing our ignorance of the past.
The pain you feel today is the strength you feel tomorrow.
“必要”不认识任何的“法律”。
神经系统是一个动态的、不断变化的系统。