You are never dedicated to something you have complete confidence in. No one is fanatically shouting that the sun is going to rise tomorrow. They know it's going to rise tomorrow. When people are fanatically dedicated to political or religious faiths or any kind of dogmas or goals, it's always because these dogmas or goals are in doubt.

Source: Zen & the Art of Motorcyle Maintenance, Pt. II, Chp. 13