Between today and the 6th of January, Christians everywhere will mark their doorways with the signs 20 + C + M + B + 16. Caspar, Melchior, Balthasar, the traditional names of three mad kings who went away and were never the same. Don't take my word for it. Hear it from T.S. Eliot:
After they had heard the king, they went on their way, and the star they had seen when it rose went ahead of them until it stopped over the place where the child was. When they saw the star, they were overjoyed. (NIV)
Remembering that they had seen the star, believing it, that's the epiphany. That is faith.