because that, knowing God, they glorified him not as God, neither gave thanks; but became vain in their reasonings, and their senseless heart was darkened.

Because, having the knowledge of God, they did not give glory to God as God, and did not give praise, but their minds were full of foolish things, and their hearts, being without sense, were made dark.

Διοτι γνωρισαντες τον Θεον, δεν εδοξασαν ως Θεον ουδε ευχαριστησαν, αλλ' εματαιωθησαν εν τοις διαλογισμοις αυτων, και εσκοτισθη η ασυνετος αυτων καρδια·

Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened.