I interpreted this as "Religious faith".
having been dissatisfied with Christianity since I was nine, Aikido has largely replaced it. With trappings from other beliefs that I steal and use as I best see fit ie Zen.
I still have a healthy respect for religions, but like everything else in the human sphere, is open to both brilliance and perversion ( and all shades in between)
So, I use my "religion" to polish myself. Thats hard enough, let alone start trying to change the world.
PS: I think this is a good question. you have to think about the question as well as the answer.