But far be it from me to boast except in the cross of our Lord Jesus Christ, by which the world has been crucified to me, and I to the world. Galatians 6:14

Our only boast is in the cross of Christ. Not in our goodness, not in our devotion, not in our efforts, not in our determination, not in our merits, not in our cleverness, not in our Bible knowledge, not in our obedience, not in anything. Our only boast is the cross of Christ. For on that cross, our debt was paid. On that cross, our sins were expunged. On that cross, our salvation was won.

Every single spiritual blessing in our life was made possible because Christ our Lord died on a cross and bore our sin. Of course we boast only in the cross.

John Piper passionately proclaims of the cross:

"Christ is the glory of God. His blood-soaked cross is the blazing center of that glory. By it he bought for us every blessing – temporal and eternal. And we don’t deserve any. He bought them all. Because of Christ’s cross, God’s elect are destined to be sons of God. Because of his cross all guilt is removed, and sins are forgiven, and perfect righteousness is imputed to us, and the love of God is poured out in our hearts by the Spirit, and we are being conformed to the image of Christ.

Therefore, every enjoyment in this life and the next that is not idolatry is a tribute to the infinite value of the cross of Christ – the burning center of the glory of God. And thus a cross-centered, cross-exalting, cross-saturated life is a God-glorifying life – the only God-glorifying life. All others are wasted." ¹

¹ John Piper, Don’t Waste Your Life