“I believe all that God ever revealed, and I never heard of a man being damned for believing too much but they are damned for unbelief.” (Sunday, 16 June 1844; Words of Joseph p. 381.

The word “unbelief” appears seventy-two times in the scriptures.
Having the definitions of the word unbelief and similar words helps me to discern the difference.
Definitions from Webster’s 1828 Dictionary

Dwindle: To diminish; become less; shrink; waste or consume away; degenerate; sink; fall away; break; or disperse.

Belief: “an assent of mind to the truth of a declaration”

Disbelief: Refusing or denying a belief

Unbelief: “withholding of belief…disbelief of divine revelation, disbelief of the truth of the gospel, rejection of Christ as the Savior of men, and of the doctrines he taught; distrust of God’s promises and faithfulness.”

Doubt: To waiver or fluctuate in opinion, to fear, to distrust, to be in suspense or uncertainty of the truth or fact.

Faith: “4. Evangelical, justifying, or saving faith is the assent of the mind to the truth of divine revelation, on the authority of God’s testimony, accompanied with a cordial assent of the will or approbation of the heart; an entire confidence or trust in God’s character and declarations, and in the character and doctrines of Christ, with an unreserved surrender of the will to his guidance, and dependence on his merits for salvation. In other words, that firm belief of God’s testimony, and of the truth of the gospel, which influences the will, and leads to an entire reliance on Christ for salvation.”