2 Corinthians 11:13-18

YLT(i) 13 for those such are false apostles, deceitful workers, transforming themselves into apostles of Christ, 14 and no wonder—for even the Adversary doth transform himself into a messenger of light; 15 no great thing, then, if also his ministrants do transform themselves as ministrants of righteousness—whose end shall be according to their works.
16 Again I say, may no one think me to be a fool; and if otherwise, even as a fool receive me, that I also a little may boast. 17 That which I speak, I speak not according to the Lord, but as in foolishness, in this the confidence of boasting; 18 since many boast according to the flesh, I also will boast: