宠辱不惊，看庭前花开花落；去留无意，望天上云卷云舒。
儒家所谓，“纵心所欲不逾矩”，道家所谓，“无为”，佛家所谓，“清净虚空”，其实说的都是一个道理，就是精神上的自由自在的状态。达到这种境界，就消解了得与失、荣与辱的界限，一切的一切就如同“庭前花开花落”、“天上云卷云舒”一般自然而然，荣辱不惊，无忧无惧。
True innovation comes from solving real-world problems.
The best time to plant a tree was 20 years ago; the second best time is now.
There is no despair so absolute as that which comes with the first moments of our first great sorrow, when we have not yet known what it is to have suffered and be healed, to have despaired and have recovered.