D&C 84:19-25; Moro. 7:3-4; 12, 13, 16, 29; 16:17 Teachings of the Prophet Joseph Smith, pp.150-151
“The ancient prophets speak of ‘entering into God’s rest’; what does it mean? Tomy mind, it means entering into the knowledge and love of God, having faith in his purpose and in his plan, to such an extent that we know we are right, and that we are not hunting for something else, we are not disturbed by every wind of doctrine, or by the cunning and craftiness of men who lie in wait to deceive… . The man who has reached that degree of faith in God that all doubt and fear have been cast from him, he has entered into ‘God’s rest,’ … The rest here referred to is not physical rest, for there is no such thing as physical rest in the Church of Jesus Christ… . We may thus enter into the rest of the Lord today, by coming to an understanding of the truths of the gospel… . But there are many [Saints] who, not having reached this point of determined conviction, are driven about by every wind of doctrine, thus being ill at ease, unsettled, restless. These are they who are discouraged over incidents that occur in the Church, and in the nation, and in the turmoils of men and associations. They harbor a feeling of suspicion, unrest, uncertainty. Their thoughts are disturbed, and they become excited with the least change, like one at sea who has lost his bearings… . Let them seek for it in the written word of God; let them pray to him in their secret chambers, where no human ear can hear, Jesus, and they will immediately begin to grow in the knowledge of the truth… . Let them seek for strength from the Source of all strength, and he will provide spiritual contentment, a rest which is incomparable with the physical rest that cometh after toil. All who seek have a right to, and may enter into, the rest of God, here upon the earth, from this time forth, now, today; and when earth-life is finished, they shall also enjoy his rest in heaven.” (Joseph F. Smith, Gospel Doctrine, pp. 58, 126)