21 because having known God they glorified him not as God neither were thankful, but became vain in their reasonings and their ignorant mind was darkened.
Romans 1:21 Cross References - Sawyer
Luke 17:15-18
15 And one of them seeing that he was cured, returned, glorifying God with a loud voice,
16 and fell on his face at his feet and thanked him. And he was a Samaritan.
17 And Jesus answered and said to him, Were there not ten cleansed? but where are the nine?
18 There are not found returning to give glory to God any but this stranger.
John 3:19
19 And this is the judgment; that the light has come into the world, and men loved darkness rather than the light, because their deeds are evil.
Acts 26:18
18 to open their eyes, to turn them from darkness to light, and from the power of Satan to God, that they may receive forgiveness of sins and an inheritance among the sanctified by faith in me.
Romans 1:19
19 because what can be known of God is manifest among them; for God has manifested [himself] to them.
Romans 1:28
28 (2:4) And as they did not choose to retain God in their knowledge, God gave them up to a reprobate mind, to do things which are not proper,
Romans 11:10
10 let their eyes be darkened that they may not see, and bow down their back always.
Romans 15:9
9 and that the nations should glorify God for mercy; as it is written, For this cause will I praise thee among nations, and sing to thy name.
Ephesians 4:17-18
2 Timothy 3:2
2 Men will be selfish, avaricious, vain, proud, blasphemers, disobedient to parents, unthankful, unholy,
1 Peter 1:18
18 knowing that you were not redeemed from your vain mode of life received by tradition from your fathers, with destructible things, silver or gold,
1 Peter 2:9
9 But you are an elect race, a royal priesthood, a holy nation, a peculiar people, that you should declare the virtues of him who called you out of darkness into his glorious light;
Revelation 14:7
7 saying with a loud voice, Fear God and give him glory, for the hour of his judgment has come, and worship him that made heaven and the earth and the sea and fountains of waters.
Revelation 15:4
4 who shall not fear thee, Lord, and glorify thy name? For thou only art holy, for all the nations shall come and worship before thee, for thy righteous ordinances have been made manifest.