Ok, I can't help but throw a rant about the Superbowl slogan, "believe in now." It is the nature of now that you don't have to believe in it; now is the given, the self-evident. A cat or an infant knows the now and they organize their lives in response to it, but they don't have to believe in it. It's a given.
The trick is to believe in the future, and the really special work is to believe in the future in such a way that it permeates and draws the now into it. That's what it means to believe in the seedling Kingdom of God, or in that classic sign and event of the end-times, the Resurrection.