Romans 1:20 – For the invisible things of Him from the creation of the world are clearly seen, being understood by the things that are made, even His eternal power and Godhead; so that they are without excuse.
Everything that God has created, from the visible to the invisible cry out as evidence of His handiwork to the glory of Him who made all things so that no man has an excuse to say that there is no God!
This passage goes on to say that “…although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened. Professing to be wise, they became fools…”