As long as the tree takes root, birds will build their own nests.

As long as the trees are deep and leafy, why worry about birds not building nests?

This sentence describes that as long as a person is good enough and perfect enough, there is no need to worry that no one likes it.

People's fate is ultimately determined by self-expectation. Self-expectation is self-confidence, which is what a person thinks he should be. When you are sure of what kind of person you should be and what kind of image you should have, you will have a feeling of returning to your original position and naturally make actions and changes consistent with your inner identity.