Romans 1:19-20 19 Since what may be known about God is plain to them, because God has made it plain to them. 20 For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that men are without excuse.
If we never read the Bible, or hear a sermon, or interact with a theist blogger, God has still revealed enough of Himself to us and our world that we can encounter Him. God is everywhere, yet invisible. God is a hidden God, but we are without excuse.