We thought that we had the answers, it was the questions we had wrong.

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

The secret of happiness，you see，is not found in seeking more，but in developing the capacity to enjoy less.

水源会枯竭 但心永不干涸

生活中最重要的事情是能够自由地做你想做的事。