Faith is necessary. The object of faith is irrelevant. It is the power of the faith itself - the overriding of all the "what ifs" thrown up by the intellect and the ego - which makes the impossible possible. The idol is made by the genuflector, not the craftsman. This is why all initiatory paths which have real power call for total devotion to the Ideal or to a particular Master who embodies the ideal. (The truly enlightened never claim to have spooky powers, but sometimes the disciples will tell stories about the Master's spooky powers. This is a sign of their faith which is not discouraged by a true Master.)
(ETA: There's a wonderful piece in the Doctor Who story The Curse of Fenris. For those who haven't seen it: it's World War Two and the Doctor et al are fighting vampires, for some reason, and of course a traditional way to fight off vamps is with a crucifix. A Red Army soldier who happens to be with them protests that he doesn't believe in Christianity; the Doctor asks him: "What do you believe in?" and he answers "I believe in the Revolution". So - get this - he takes the hammer-and-sickle badge off his cap and fights the vampires off with that. Even faith in the cynical bureaucratic murderer Joe Stalin can move mountains.)
For all we have criticised the Leninist sects, you must admit that their belief system gives them incredible powers to face ridicule, to stand on street corners selling badly-xeroxed papers, etc., for an entire lifetime. The problem with some of them is that they don't teach "loving-kindness", or in other words, integrity - instead they have a half-assed belief in "Bolshevik ethics" which, in practice, boils down to the same kind of Might = Right nonsense that we rightly despise when we hear it coming from the fascists (and would make Trotsky spin in his grave). The problem with others is that they've given up actually changing things in the Big World and have become nothing but a substitute religion.
But are we to say that they have no right to exist or to participate in the movement - that they would be better off individually giving up and getting some bourgeois job? Surely they can be annoying, but is that a problem with them or a problem with us? I'm reminded of secular atheists who curse religious believers for "relying on a crutch". The implication is that secular atheists are both ethically and psychologically superior. But what do they do with that superiority? (Can someone point me to hospitals, schools, charity drives etc. started by humanist organisations? I'm sure there are some.)
"Atheism" and "secularism" are both negatives - no religion - but why do you stay alive in the absence of any metaphysical meaning? Is the answer nothing but "pure hedonism" - or, more likely, "live the capitalist dream, earn money to buy leisure commodities, have a good time, then die?" Many people would rather stay in a cult than accept a lifetime of nothing more than psychic masturbation. As Seven of Nine put it before she was reverse-assimilated, "WE DO NOT WANT TO BE LIKE YOU".
The point is: don't be so quick to tear down someone else's faith before examining your own. And yes, you have one, even if it's not in God. I am increasingly thinking Fripp was right when he said "any act based on principle is a good one".