The only limit to our realization of tomorrow is our doubts of today.
实现明天理想的唯一限制是我们今天的疑虑。
数学的力量在于它的普遍性和超越文化界限的能力。
"You have to be willing to go to the places that scare you."
Either you repeat the same conventional doctrines everybody is saying, or else you say something true, and it will sound like it's from Neptune.