当你怀疑自己能否飞翔的那一刻，你就永远失去了飞翔的能力。
"The moment you doubt whether you can fly, you cease for ever to be able to do it."
The best way to find the truth is to follow the evidence wherever it leads.
I'm not a rapper, I'm a history legend.
Your most unhappy customers are your greatest source of learning.
What fun was it without having me around?