I know this is hard to believe, but it's the truth. I remember being in the womb, and feeling the presence of God before I was even born. I loved Him and wanted to please Him before anyone ever taught me about Him. This is how I know for certain that He is real, because I knew Him before anyone could convince me.
Some say it must have been a dream, or the remembrance of a dream, but I know the difference between memories and dreams. Besides, it has been continual my whole entire life. I have always felt His presence, and my conscience has always prayed to Him. Believe it, don't believe it, it remains true either way.