I absolutely love that quote because it so accurately depicts our nature as people. In The Perks of Being a Wallflower the characters are speaking in the context of romantic love, but if I remove the word love the concept still holds true. “We accept what we think deserve.” More specifically, we accept what is familiar, normal, or safe.
When you think about it, we not only accept the love we think we deserve, we accept the life style, friends, significant other, job, and respect (or lack of), but why?