General Revelation is called general because that’s what it is. It’s knowledge of God that is general, given to everyone. Every person, in every generation, regardless of religious belief, or physical location can see the general revelation of God.
Psalm 19:1-2 says, ‘The heavens declare the glory of God, and the sky above proclaims His handiwork. Day to day pours out speech, and night to night reveals knowledge.’
This passage teaches that the entire world is God’s audience and all creation is the theater of His glory, so anyone can see the glory and grandeur of God displayed in creation. This is why some theologians call general revelation, ‘natural revelation.’ The musician Andrew Peterson sings about this in one of his songs saying, ‘I can see Him it the sea’s of wheat, I can feel it in the horses run, howling on the snowy peaks, blazing in the midnight sun.’ This is the reason we are drawn to sunsets, sunrises, tall mountains, and white beaches, because in them God reveals Himself.
Romans 1:18-20 also makes this clear saying, ‘For the wrath of God is revealed against all ungodliness and unrighteousness of men, who by their unrighteousness suppress the truth. For what can be known about God is plain to them, because God has shown it to them. For 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.’
Notice what Paul says here. God’s attributes and eternal power are plain to all men, because God has shown it to us through what has been made. Creation visibly displays the invisible God. Because of this, all men know God and are without excuse. Paul concludes in Romans 1:21 saying, ‘For 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.’
This is clear is it not?
All humanity has the opportunity to know God through general revelation, through creation, but we see the sin of man in that man refuses to acknowledge, delight in, or humbly submit to what we know to be true.
The result of suppressing this truth is twofold: in v21 Paul says our thinking becomes futile, and our hearts are darkened.