In poetry, the poet's mind plays a contradictory role. It agrees with the leaves on the tree and the stars at the top of the tree, but the feelings of the leaves and the stars are just opposite.
The poet lists the unchangeable side of human mind as the center of gravity, which shows his positive attitude of pursuing constancy in change and eternity in decline.
This poem, very concisely and successfully, uses two artistic techniques commonly used in poetry creation: first, touching feelings, writing objective scenery first, then writing subjective feelings; The second is rebellious contrast, that is, the change and invariability of the mind.