The secret of change is to focus all of your energy，not on fighting the old，but on building the new.
改变的秘诀是集中你的所有能力，不是摧毁旧的，而是建造新的。
The absence is often more powerful than the presence.
Letters are the biographer's gold mine; they reveal what official records conceal.
The world needs more people who are willing to challenge the status quo.