Wisdom, once again, from Thomas Merton:
Persons are not known by intellect alone, not by principles alone, but only by love. It is when we love the other, the enemy, that we obtain from God the key to an understanding of who he is, and who we are.
It is only this realization that can open to us the real nature of our duty, and of right action. To shut out the person and to refuse to consider him as a person, as an other self, we resort to the impersonal “law” and to abstract “nature.”
That is to say we block off the reality of the other, we cut the intercommunication of our nature and his nature, and we consider only our own nature with its rights, its claims, it demands