The most powerful weapon you have is your voice.

实现可持续增长的唯一途径是拥抱变化并挑战现状。

The most profound ideas in mathematics often arise from the simplest observations.

The best performance improvement is the transition from the nonworking state to the working state.

不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。