Romans 1:21

21 for though they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their senseless minds were darkened.

Romans 1:21 In-Context

19 For what can be known about God is plain to them, because God has shown it to them.
20 Ever since the creation of the world his eternal power and divine nature, invisible though they are, have been understood and seen through the things he has made. So they are without excuse;
21 for though they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their senseless minds were darkened.
22 Claiming to be wise, they became fools;
23 and they exchanged the glory of the immortal God for images resembling a mortal human being or birds or four-footed animals or reptiles.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.