I highly recommend a recent piece in New York Magazine by Andrew Sullivan.
Everyone has a religion. It is, in fact, impossible not to have a religion if you are a human being. It’s in our genes and has expressed itself in every culture, in every age, including our own secularized husk of a society.
By religion, I mean something quite specific: a practice not a theory; a way of life that gives meaning, a meaning that cannot really be defended without recourse to some transcendent value, undying “Truth” or God (or gods).