God has proven himself before. He did it in the land of Egypt when he proved to pharaoh and the entire nation that He alone is God even though they had many kinds of God. They had gods from the river. They had gods from the sun and the stars. Egypt was a nation which had so many gods. The Almighty God proved himself as the only one true God.
God is not hidden from us. We should not think that God is not known to us. Everything that we should know about God, it has been revealed unto us. Our God is the true God who created the heavens and the earth. He is the one who controls the affairs of this world.
Believing in God is the only thing which we should do. We should believe in God. We should not argue about the existence of God. It is only someone who is regarded as a fool that thinks that there is no God. There is a God who watches over the affairs of the entire universe. God has revealed himself to us in many ways, let us follow Him and keep His commandments. The Lord He is God. We are the sheep of His pastures.