当没有人相信你的时候,你必须相信自己。
The best moments in our lives are not the passive, receptive, relaxing times… The best moments usually occur if a person’s body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.
爱不是容易的事。
数学之美不在于其复杂性,而在于其简洁性以及它揭示的关于宇宙的深刻真理。