Everyone can clearly know what God is like; so no one has a basis for saying, “We never knew about God.”

Romans 1:19-23

19 Everyone can clearly know what God is like, because God himself has revealed to everyone what he is like. 20 People cannot see what God is like. But ever since he created the world, by means of what he created he has clearly revealed what he is like. He has made clear to everyone that he has always been able to do very powerful things. Therefore, we should recognize that God is powerful, completely different from all that he created. So no one has a basis for saying, “We never knew about God.” 21 Although the non-Jews knew what God is like, they did not honor him as God, nor did they thank him for what he had done. But instead, they began to think foolish things about him, and they became unable to understand [MET] what he wanted them to know. 22 Although they claimed that they were wise, they became foolish, 23 and they refused to admit that God is glorious and will never die. Instead, they made and worshipped idols that resembled people who will some day die, and then they made other idols that resembled birds and four-footed animals, and finally they made idols that resembled reptiles.