画布是一面镜子，不仅反映艺术家的灵魂，也反映社会的灵魂。

You don't need a weatherman to know which way the wind blows.

Humor is a powerful tool in children's books; it can make serious topics accessible.

The mind is a flow of ever-changing experiences.

现在数学家面临的最大问题可能是黎曼假设。