You can search throughout the entire universe for someone who is more deserving of your love and affection than you are yourself, and that person is not to be found anywhere. You yourself, as much as anybody in the entire universe deserve your love and affection.

This quote means that you should love yourself before expecting that from someone else. Nobody in the entire universe deserves more of your love and affection than you do. You should not be looking for someone else to make you feel worthy or valuable because the only person who can do that is you. Therefore, you should show yourself love and kindness first.