16For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.
17For in it the righteousness of God is revealed from faith for faith, as it is written, “The righteous shall live by faith.”
18For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who by their unrighteousness suppress the truth.
19For what can be known about God is plain to them, because God has shown it to them. 20For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse.
21For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.
22Claiming to be wise, they became fools,
23and exchanged the glory of the immortal God for images resembling mortal man and birds and animals and creeping things.
24Therefore God gave them up in the lusts of their hearts to impurity, to the dishonoring of their bodies among themselves,
25because they exchanged the truth about God for a lie and worshiped and served the creature rather than the Creator, who is blessed forever! Amen.
Crossway Bibles (2011-02-09). The Holy Bible, English Standard Version (with Cross-References) (Kindle Locations 37565-37572). Good News Publishers/Crossway Books. Kindle Edition.
The point I want to bring to you with this text is in verses 19 and 20. The Bible says that everyone knows that there is a God, the Christian God. When witnessing, we don't ever have to prove the existence of God to anyone. Everyone already knows within themselves that there is the Christian God, they just chose to dishonor Him as God or give thanks to Him. The foolishness of their heart turned to darkness. In reading further in this text, one can see what lifestyle choices and gender confusions are made by the foolish dark hearted ones that make the choice to dishonor and not believe.
For what can be known about God is plain to them, because God has shown it to them.