The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Happiness is a choice, not a result.
"To be free is not merely to cast off one's chains, but to live in a way that respects and enhances the freedom of others."
如果你想成功，就从别人的错误中学习。
宇宙的美在于它的复杂性和简单性。