" This is true love and the genuine rule of a Christian life. Love is true and genuine where there is true and genuine faith. Hence the Apostle says of love in I Cor. 13 [:5] that "it does not seek its own."
We conclude, therefore, that a Christian lives not in himself, but in Christ and in his neighbor. Otherwise he is not a Christian. He lives in Christ through faith, in his neighbor through love. By faith he is caught up beyond himself into God. By love he descends beneath himself into his neighbor. Yet he always remains in God and in his love, "

― Martin Luther , Three Treatises