knew. Greek. ginosko. App-132.
glorified. Seep. 1511.
but. Emphatic.
became vain. Greek. mataioomai. Only here. Compare Acts 14:15.
imaginations. reasonings. See Matthew 15:19.
foolish. Greek. asunetos, as Romans 1:31.
Related Commentaries of Romans 1:21
Romans 1:21
21 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.