From Thomas Merton:

The beginning of the fight against hatred, the basic Christian answer to hatred, is not the commandment to love, but what must necessarily come before in order to make the commandment bearable and comprehensible. It is a prior commandment, to believe. The root of Christian love is not the will to love, but the faith that one is loved. The faith that one is loved by God. That faith that one is loved by God although unworthy - or, rather, irrespective of one's worth.