Ask for a poem about self-reflection! !

If you don't climb the mountain, you don't know the height of the sky; Don't face the deep stream, I don't know the thickness of the ground. -"Xunzi, Encourage Learning"

The encouragement period is not limited, and the return is more. —— Ouyang Xiu

Black hair doesn't know how to study hard early, but white hair hates studying late. -Yan Zhenqing

Worry and fatigue can rejuvenate the country, and leisure can forget the body. —— Ouyang Xiu

Don't be too far away from the ends of the earth, but be willing to throw a whip. Yuan Mu

The mountain is never too high, and the sea is never too deep. -Cao Cao