The main problem with those who deny the existence of God is not intellectual. It is not because of insufficient information, or that God’s manifestation of himself in nature has been obscured. The atheists’ problem is not that they cannot know God, rather it is they do not want to know him. Man’s problem with the existence of God is not an intellectual problem; it is a moral problem. For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men – Rom. 1:18
R. C. Sproul
Now it would be
Now it would be as absurd to deny the existence of God, because we cannot see him, as it would be to deny the existence of the air or wind, because we cannot see it. Adam Clarke