我们对宇宙理解的唯一限制是我们的想象力。
Success is not the key to happiness. Happiness is the key to success.
唯一的好是知识，唯一的恶是无知。
The only way to do great work is to love what you do.
The most glorious moments in your life are not the so-called days of success, but rather those days when out of dejection and despair you feel rise in you a challenge to life, and the promise of future accomplishment.
