Religion is doing a man does not merely think his religion or feel it, he 'lives' his religion as much as he is able, otherwise it is not religion but fantasy or philosophy.
Without self knowledge, without understanding the working and functions of his machine, man cannot be free, he cannot govern himself and he will always remain a slave.
In properly organized groups no faith is required what is required is simply a little trust and even that only for a little while, for the sooner a man begins to verify all he hears the better it is for him.
If you want to lose your faith, make friends with a priest.