The true challenge in mathematics is not solving problems, but asking the right questions.
数学中真正的挑战不是解决问题，而是提出正确的问题。
The mind， both in so far as it understands， and in so far as it imagines， is passive.
思想掠过我的心上，如一群野鹘飞过天空。我听见它们鼓翼之声了。
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.