生活中唯一的限制是你自己设定的。
The only limits in life are the ones you make.
Psychology must be based on facts, not hypotheses.
Memory， I realize， can be an unreliable thing； often it is heavily coloured by the circumstances in which one remembers.
A purpose of human life, no matter who is controlling it, is to love whoever is around to be loved.
系统的稳定性取决于开环传递函数在复平面上的行为。
艺术是使我们能够认识真相的谎言。