Selection from Arcana Cœlestia ~ Emanuel Swedenborg
Regarded in itself, faith is a faith in the understanding and a faith in the will; to know and understand the truth which is of faith is called faith in the understanding; but to will the truth which is of faith is called faith in the will. ... That faith in the understanding, or the understanding of truth, precedes faith in the will, or the willing of truth, must be evident to everyone; for when anything is unknown to man (such as heavenly good), he must first know that it exists, and understand what it is, before he can will it.
(from Arcana Cœlestia 3863:3)