Purity of heart is to will one thing.
心灵的纯洁是愿意一件事。
我能计算天体运行的轨迹，但无法计算人类的疯狂。
成功的真正标准是我们如何提升我们所运营的社区。
One can choose to go back toward safety or forward toward growth. Growth must be chosen again and again; fear must be overcome again and again.
我不相信运气。我相信努力和坚持。
The beauty of mathematics only shows itself to more patient followers.
