The gospel yet further tends to lead us to humble exercises of love as it leads us to love Christ as one that was crucified for our sins. Christ’s being crucified is a great argument for the humility of us who are his followers; but his being crucified for our sins is a much further argument for it. For Christ’s being crucified for our sins is the greatest testimony of God against our sins that ever was. It shows more of God’s abhorrence of our sins than any other dispensation of God. God so abhorred our sins that he would have them so terribly punished, and his wrath so exerted against them, even when imputed to his own Son. So that this is the greatest inducement to our humility which can be, on these two accounts. First, it is the greatest manifestation of the vileness of that nature for which we should be humble. And second, it is the greatest argument to our love to this humble Savior whom the gospel holds forth. Because, the excellency of Christ and the love of Christ appear more in that act, his yielding himself to be crucified for us, than in any other act. So that these two things considered together tend above all things to draw forth the exercises of humble love.
Charity and Its Fruits: Living in the Light of God’s Love (Wheaton, IL; Crossway Books; 2012) p. 157-158