 Generally, acts of overbelief are justified on emotional need or faith, and a need to make sense of spiritual experience, rather than on empirical evidence.This idea originates from the works of William James in The Varieties of Religious Experience and refers to the conceptual framework that individuals have.In overbelief, James explained the role of human temperament in philosophy, particularly how it creates a bias on the part of a philosopher that could be stronger than any of his more objective premises.