Romans 1 21
For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened.
Compare with other 3 random translations
EAS Romans 1:21Those people really knew about God. But they did not respect him as a great God, and they did not thank him. They did not even think clearly any more. Their minds became confused and they did not understand God's message.
NKJ Romans 1:21because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened.
NCV Romans 1:21They knew God, but they did not give glory to God or thank him. Their thinking became useless. Their foolish minds were filled with darkness.