The deepest insights in mathematics often come from the most abstract theories.
自身无灾无病，感受不到快乐，等到生病卧床，才了解到无灾无病的快乐；家中平安无事，感受不到快乐，等到祸事临头，才体会到平安无事的快乐。
You may have the worst of your worries when you most appear to be at ease.
股票市场充满了知道一切价格但不知道任何价值的人。
The future of mobility depends on balancing technology and human needs.