I just got BNW, and before that have only played through maybe 2 games of G&K, in one of which I played the Celts. I noticed that a lot of the pantheons/beliefs/religious buildings etc... actually just give you more Faith, which you can then use to enhance your Religion or buy something that will give you more Faith--my point being Faith seems to be a sort of cyclic process of spending Faith to gain Faith, which has me questioning it's value. The question is if the rewards from Faith are worth the investment. Some things like the 'Just War' belief seem to be strong, but many look relatively quite weak, and can be gained via other means. I do suppose Faith is an efficient way to buy units, if nothing else. Looking to get the thoughts of those with more experience with the Religion system on how worthy it is for both Civs that have a Religion focus and those who do not.