Romans 1:20-21

God's Wrath on Unrighteousness

²⁰ For since the creation of the world _e His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and ₁ Godhead, so that they are without excuse, ²¹ because, although they knew God, they did not glorify Him as God, nor were thankful, but _f became futile in their thoughts, and their foolish hearts were darkened.

1. Cross References
   Job 12:7 - 9
   But now ask the beasts, and they will teach you; And the birds of the air, and they will tell you.
   Psalms 19:1 - 6
   The heavens declare the glory of God; And the firmament shows His handiwork.
   Jeremiah 5:22
   Do you not fear Me?' says the LORD. 'Will you not tremble at My presence, Who have placed the sand as the bound of the sea, By a perpetual decree, that it cannot pass beyond it? And though its waves toss to and fro, Yet they cannot prevail; Though they roar, yet they cannot pass over it.
   
2. Cross References
   2 Kings 17:15
   And they rejected His statutes and His covenant that He had made with their fathers, and His testimonies which He had testified against them; they followed idols, became idolaters, and went after the nations who were all around them, concerning whom the LORD had charged them that they should not do like them.
   Jeremiah 2:5
   Thus says the LORD: "What injustice have your fathers found in Me, That they have gone far from Me, Have followed idols, And have become idolaters?
   Ephesians 4:17
   This I say, therefore, and testify in the Lord, that you should no longer walk as the rest of the Gentiles walk, in the futility of their mind.