For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.
With God - in the judgment of God.
It is written - in Job 5:13. This formula of quoting SCRIPTURE establishes the canonicity of Job.
He taketh the wise in their own craftiness - proving the "foolishness" of the world's wisdom, since God makes it the very snare to catch those who think themselves so wise. Literally, He who taketh х drassomenos (G1405)], graspeth with his hand, etc., the whole sentence not being quoted, but only the part which suited Paul's purpose.