Faith is believing in something or someone unquantifiable. It is about believing in something that requires more than your intellect and physical senses. I have faith in the goodness of the world. There is a phenomenal saying in the movie The Marigold Hotel I think, it stars Judi Dench and Maggie Smith, it is about British visitors and a hotel in India. The young Indian concierge says to one of the visitors, everything will work out in the end, if it is not working out then it is not yet the end. I find that phrase to be the best frame of reference one can have in life. There in that one phrase you find a beautiful expression of faith.