Authors, Entrepreneurs, and other Creative Individuals Pursuing Their Dreams
In the quest to know is the learning to doubt. If you know the subject you have no doubt. Faith and Belief contain doubt because one does not know the subject so has faith in it or a belief in it. The religion that does not have doubt is a dead religion because the congregation is not growing or learning.
The comments are true but I would go a step further.
Belief is what you do when you don't know. It's like filler in the gaps of knowledge. Generally, it is not a problem but can become a problem when the "believer" insists others must believe as they believe.
Faith is a trickier word. It is often a substitute for hope. It can become a problem when knowledge clashes with belief. When that happens, a person will often reject knowledge because it is knocking down the pillars of faith.
The words we use are important because they can greatly influence how we think and what we believe.