The mind once enlightened cannot again become dark.
解释：形体弯曲，影子自然就曲；形体正直，影子自然就正。
人生是一场无法预测的冒险。
The key to solving complex problems is often to find the right abstraction that simplifies the problem without losing its essential features.
I don't compete with anyone but myself.
我不考虑过去或未来。我专注于现在。
数字革命比文字的发明甚至印刷术的发明更为重要。
种树的最佳时间是二十年前，其次是现在。
The problem with the world is that the intelligent people are full of doubts, while the stupid ones are full of confidence.
写一本书就像去一个未知的国度旅行。