People are afraid to pursue their most important dreams, because they feel that they don't deserve them, or that they'll be unable to achieve them. We, their hearts, become fearful just thinking of loved ones who go away forever, or of moments that could have been good but weren't, or of treasures that might have been found but were forever hidden in the sands.

真正的发现之旅不在于寻找新的风景，而在于拥有新的眼光。

数学中真正的挑战不是解决问题，而是提出正确的问题。