Romans 1:21

¹⁹ Because that which may be known of God is manifest in them; for God hath shewed it unto them.

²⁰ For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:

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.

²² Professing themselves to be wise, they became fools,

²³ And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: For although they knew God, they neither glorified Him as God nor gave thanks to Him, but they became futile in their thinking and darkened in their foolish hearts.
KJV: 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.
WEB: Because knowing God, they didn’t glorify him as God, and didn’t give thanks, but became vain in their reasoning, and their senseless heart was darkened.
ASV: 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.
DARBY: Because, knowing God, they glorified [him] not as God, neither were thankful; but fell into folly in their thoughts, and their heart without understanding was darkened:
BLB: For having known God, not as God did they glorify [Him], or give thanks, but they became futile in their thoughts and their foolish heart was darkened.

ÅB: for selv om de kjente Gud, gav de ham ikke takksigelsen og æren som tilfaller Gud, men de ble fordervet i tankene sine, og deres uforstandige hjerte ble formørket.
OTB: For selv om de kjente Gud, æret de ham verken som Gud eller takket ham, men deres tanker ble meningsløse og deres uforstandige hjerter ble formørket.
B1930: fordi de, enda de kjente Gud, dog ikke æret eller takket ham som Gud, men blev dårlige i sine tanker, og deres uforstandige hjerte blev formørket.

Study notes (Tyndale)

Original text and word study

Cross references

Ephesians 4:17–18
This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind,
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2 Kings 17:15
And they rejected his statutes, and his covenant that he made with their fathers, and his testimonies which he testified against them; and they followed vanity, and became vain, and went after the heathen that were round about them, concerning whom the LORD had charged them, that they should not do like them.
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Jeremiah 2:5
Thus saith the LORD, What iniquity have your fathers found in me, that they are gone far from me, and have walked after vanity, and are become vain?
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2 Timothy 3:2
For men shall be lovers of their own selves, covetous, boasters, proud, blasphemers, disobedient to parents, unthankful, unholy,
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Psalms 50:23
Whoso offereth praise glorifieth me: and to him that ordereth his conversation aright will I shew the salvation of God.
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John 3:19
And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.
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Revelation 14:7
Saying with a loud voice, Fear God, and give glory to him; for the hour of his judgment is come: and worship him that made heaven, and earth, and the sea, and the fountains of waters.
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Psalms 81:12
So I gave them up unto their own hearts’ lust: and they walked in their own counsels.
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