Ultimately, if you could know for certain that there is a God, then you have no need for faith. Faith in God requires that you cannot know for certain there is a God - you simply believe it must be true.
“Faith in God requires that you cannot know for certain there is a God - you simply believe it must be true.”
But then faith in God is really faith that the men who wrote the bible didn’t lie, isn’t it?
Faith in God may be simply trust in His goodness. You may have experienced His presence, His life-changing power within your soul. But day-to-day tests and challenges require you to demonstrate trust in Him under new circumstances.
Faith in God may not mean that you don't know for sure that He exists. Rather, it may be the challenge to exhibit trust, as a child who will jump from a tree branch when his daddy says, "Jump, I will catch you." Except that in the adult's walk of faith, he doesn't have the advantage that the child does of hearing an audible voice.