2 Corinthians 11:18

Seeing that many glory in the flesh, I will glory also.

Having laid the groundwork for it, being careful to reveal his natural loathing at being forced, in a sense, to resort to such a thing, and also his pure intention of redeeming his beloved converts from the control of their enemies, Paul announced in this verse his purpose of proving the utter worthlessness of the false apostles' vaunted credentials, not one of whom could even approach the matchless authentication manifested in a true apostle like Paul. When the hay and stubble of their false claims were viewed alongside the pure gold of God's work in the life of Paul, only a fool could have failed to see the difference.