There is no effective rational answer to the challenge: "But give me a reason why I should love someone who does not deserve it." Love is the highest thing. There can be no higher reason to justify it.
Peter KreeftNo culture in history has ever embraced moral relativism and survived. Our own culture, therefore, will either (1) be the first, and disprove history's clearest lesson, or (2) persist in its relativism and die, or (3) repent of its relativism and live. There is no other option.
Peter Kreeft