The greatness of God's majesty and the nature of His character are revealed to all mankind in creation. It is a constant witness of His existence. Despite what you might be led to believe, many scientists - astronomers and microbiologists - have been moved by their observations to believe in a transcendent God.
"Look at the world through either a microscope or a telescope and you will be dwarfed into terror by the infinitely minute or the infinitely great; both are appalling." ~ Baffled to Fight Better, Oswald Chambers