Erich Fromm said this quote
“ Unconditional love corresponds to one of the deepest longings, not only of the child, but of every human being; on the other hand, to be loved because of one's merit, because one deserves it, always leaves doubt; maybe I did not please the person whom I want to love me,maybe this, or that—there is always a fear that love could disappear. Furthermore, deserved love easily leaves a bitter feeling that one is not loved for oneself, that one is loved only because one pleases, that one is, in the last analysis, not loved at all but used. ”