God is God for All to See

For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men who suppress the truth in unrighteousness, because that which is known about God is evident within them; for God made it evident to them.  For since the creation of the world His invisible attributes, His eternal power and divine nature, have been clearly seen, being understood through what has been made, so that they are without excuse.

Romans 1:18-20

Our God is not some scrap of metal or rock which can be hidden in a secret place.  Our God is everywhere, and He says, “Look at Me and all I have done and all I am doing.” 

God has liberally made His power and presence known to man since the beginning of time through His creations in the natural world.  God not only made the trees and flowers, He also made lightening.  He so shaped humans that they have the capacity to learn and understand and feel compassion for one another.  Even the worst humans, have these innate qualities.  And because of these qualities, all men and women are exposed to the truth of God, which they may embrace or deny. 

The denial of the truth does not make the truth any less the truth.   

And therefore, God is right in His judgment that those who deny His existence are without excuse.