Human history began as an act of disobedience, and it is not unlikely that it will be terminated by an act of obedience. At this point in history the capacity to doubt, to criticize and to disobey may be all that stands between a future for mankind and the end of civilization.
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.