The night is a great canvas, but the stars are its paint.

The beauty of mathematics is not in its complexity, but in its simplicity and the profound truths it reveals about the universe.

教师个人的范例，对于青年人的心灵，是任何东西都不可能代替的最有用的阳光。

解析：心是身体的主宰，意是心的发用。