In his youth, George Washington developed faith. He was very private about his faith. During the Revolutionary War his soldiers Knew he often went into the trees to be alone in prayer, or sometimes he knelt in his officers quarters. But George was private about his beliefs, usually referring to “the hand of Providence” when he knew he had been protected by God.
Faith to him was a private thing. Faith required no proof.
Or as Emily Dickinson put it:
“I never saw a moor,
I never saw the sea,
Yet know I how the heather looks,
And what a wave must be.