2 Bible Verses about Boasting, Legitimate

so that, as the Scripture says, "Let him who would boast, boast of the Lord!"

You look at things externally. If anyone is sure he belongs to Christ, let him think again and understand that I belong to Christ just as much as he. For suppose I do boast a little too much of my authority??hich the Lord gave me to build you up, not to pull you down?? will not have to blush for it.