This is the most important question one can ask. The Bible is clear that God exists. The first words of the Bible are, “In the beginning God ...” (Genesis 1:1). The entire Bible claims to be inspired by God. In the prophet Isaiah, God declares, “I am God, and there is no other; I am God, and there is none like me. I make known the end from the beginning, from ancient times, what is still to come. I say, ‘My purpose will stand, and I will do all that I please.’” (Isaiah 46:9-10) 

In the Bible, God reveals Himself as the only Supreme Being, with no gods created before or after Him in all of existence, in all places, in all time (Isaiah 43:10; 44:6). He has always been God and was never anything else (Psalm 90:2). He is Eternal (Isaiah 57:15), Omnipotent (Jeremiah 32:17,27), Omnipresent (Psalm 137:12), and Omniscient (1 John 3:20). He is Love (1 John 4:8,16); Light (1 John 1:5); Truth (Psalm 117:2); and Creator (Genesis 1:1).