We have the same enemy now as we did 20 years ago, Satan.
Faith is confidence in what we hope for and the assurance in what we cannot see.
Belief is an acceptance that something exists or a statement that something is true.
Doubt is the question of our faith. We can only doubt if you already believe something.
Unbelief is determined refusal to believe. It ignores the obvious and is easily offended.
It was not doubt that prevented Jesus from doing many miracles in His hometown. It was knowledge of their unbelief that cause Him to choose not to.