"Our Savior having shown, in the parable of the Samaritan (Luke 10:36), that the term neighbor comprehends the most remote stranger, there is no reason for limiting the precept of love to our own connections. I deny not that the closer the relation the more frequent our offices of kindness should be. For the condition of humanity requires that there be more duties in common between those who are more nearly connected by the ties of relationship, or friendship, or neighborhood. And this is done without any offense to God, by whose providence we are in a manner impelled to do it. But I say that the whole human race, without exception, are to be embraced with one feeling of charity: that here there is no distinction of Greek or Barbarian, worthy of unworthy, friend or foe, since all are to be viewed not in themselves, but in God. If we turn aside from this view, there is no wonder that we entangle ourselves in error. Wherefore, if we would hold the true course in love, our first step must be to turn our eyes not to man, the sight of whom might oftener produce hatred than love, but to God, who requires that the love which we bear to him be diffused among all mankind, so that our fundamental principle must ever be, Let a man be what he may, he is still to be loved, because God is loved."
—John Calvin, Institutes of the Christian Religion (trans. Henry Beveridge), Book II, 8.55