We have assembled together to do the business of the Lord and it is through the great mercy of our God that we are spared to assemble together, many of us have gone at the command of the Lord in defiance of everything evil, and obtained blessings unspeakable, in consequence of which our names are sealed in the Lamb's book of life, for the Lord has spoken it. It is the privilege of every Elder to speak of the things of God; and could we all come together with one heart and one mind in perfect faith the veil might as well be rent today as next week, or any other time, and if we will but cleanse ourselves and covenant before God, to serve Him, it is our privilege to have an assurance that God will protect us at all times.
Teachings of the Prophet Joseph Smith, sel. Joseph Fielding Smith (1976), 8–9.
Until we have perfect love we are liable to fall and when we have a testimony that our names are sealed in the Lamb's book of life we have perfect love and then it is impossible for false Christs to deceive us.
Teachings of the Prophet Joseph Smith, sel. Joseph Fielding Smith (1976), 9.