Doctrine of Christ
More than belief, faith is a principle of action that requires one to act on belief in order to produce faith. The Lectures on Faith are a study on the topic. Joseph Smith defined faith as a principle of power through action, in which one puts those beliefs into action and thereby acquires power. Joseph related faith to having power. One can spend a lifetime as a “believer” without ever developing faith. Before belief can turn into faith, action is required. Without some action consistent with belief, a disciple cannot move along from mere belief to developing faith.
Belief becomes faith, and faith becomes knowledge. Knowledge is what one gets when they are “redeemed from the fall” as Christ explained to the Brother of Jared.
“You thus learn some of the first principles of the Gospel, about which so much hath been said. When you climb a ladder, you must begin at the bottom, and ascend step by step, until you arrive at the top; and so it is with the principles of the Gospel–you must begin with the first, and go on until you learn all the principles of exaltation. But it will be a great while after you have passed through the veil before you will have learned them all. It is not all to be comprehended in this world; it will be a great work to learn our salvation and exaltation even beyond the grave.”