你的20岁是你人生中最具决定性的十年。
Your 20s are the most defining decade of your life.
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
Knowledge is the key to unlocking the door to the soul.
Never underestimate the power of small, consistent improvements.
Without freedom, there is no creation, and without creation, there is no true life.