He [Christ] thus loved us without any expectation of ever being requited by us for his love. He did not stand in need of anything we could do for him, and knew that we should never be able to requite him for his kindness to us, or do anything towards it; for he knew that we were poor, maimed, halt and blind, empty needy vagabonds, who could only receive from him, and could render nothing to him. He knew that we had no money or price; that instead of receiving anything from us, he must give us all things that we needed, or we should be eternally without them. Now how far shall we be from a selfish spirit, and how contrary to it, if we love one another after such a manner, or if there be the like spirit of love in us towards others which was in Christ towards us. Our love to others will not depend on their love to us; but we shall do as Christ did to us, love them, though enemies. We shall not only seek our own things, but we shall be in our hearts so united to others that we shall look on their things as our own. We shall look on ourselves interested in their good, as it was in Christ towards us. We shall be ready to forego and part with our own things in many cases for the things of others, as Christ expended and was spent for us. And these things we shall do without any expectation of being requited by them, as Christ did such great things for us without expectation of any requital from us.
Charity and Its Fruits: Living in the Light of God’s Love (Wheaton, IL; Crossway Books; 2012) p. 175-176