Takes effort. Belief, in the end, is going to require some kind of action—likely something that you’d rather not do. Something that’s going to require more energy than you think you have. Something that looks like undoing something else you previously worked hard to accomplish. Something that seems foolish. Something that looks ridiculous to others. Something that maybe even feels wrong to do.
Like rolling a stone away from a tomb.
Belief that sits on its hands is not belief, because to believe means to trust, and trust looks like doing something in response to the one you trust.