The most profound ideas in mathematics often arise from the simplest observations.
你的痛苦无法停止是因为我。
The absence of alternatives clears the mind marvelously.
对抗压力最强大的武器是我们选择一种思想而非另一种的能力。
"Everything is a learning process: any time you fall down, it's just teaching you to stand up the next time."