I see a great deal of this, even in philosophical sense, requires a somewhat religious (Christian) approach to the subject, which will not open to those who do not share or know the religious teachings and morality of Christian religion.
For those who do know the teachings or do not, but are not able to feel love and thus act according to the love required, I would not say they are not in the right morality. Even though I can't even see how loving yourself and others would require it to be seen as morally good, as the love can be good even if not seen as a subject of morality.