By my faith God exist. By hearing you will gain faith through the Gospel of Christ.
Believing God exist is just like describing a rainbow to the blind man. Supposed I am blind and you are a good friend of mind telling me how beautiful rainbow is. with a glowing 7 colors; red, orange, yellow, green, violet, indigou and blue.
Surely what you say is truth because you saw it. but i believed what you saw. No one does can proved GOD exist, unless you will experience HIM. For i have feel and experience HIS power changing my life.