痛苦是一扇门，通向比它本身更伟大的东西。
The only limit to our realization of tomorrow is our doubts of today.
The concept of the social sculpture is the most important thing.
生活不是等待暴风雨过去，而是学会在雨中跳舞。
蒸汽的力量如今已被充分理解，剩下的只是改进实践。