We are what we repeatedly do. Excellence, then, is not an act, but a habit.
形容世事变化无常,难以预测。
The time of life is limited and unchangeable, so it is necessary to use every minute efficiently. Not using it well is a waste.
O tempo é o melhor autor: sempre encontra um final perfeito.
The arithmetic of modular forms is a key to understanding the deeper mysteries of number theory.