1. All Christian churches, except the LDS, are in error and are abominations before God.
a) Except for LDS (Mormon) church, all churches are false. 'I was answered that I must join none of them, for they were all wrong; and the personage who addressed me said that all their creeds were an abomination in his sight; and those professors were all corrupt.' [Pearl of Great Price, Joseph Smith 2:19]. 'This Church is the only true and living church upon the face of the whole earth.' [Doctrine and Covenants 1:30]. 'There is no salvation outside the Church of Jesus Christ of Latter-day Saints' [Mormon Doctrine, p. 670]

2. The Bible is a weak source of truth. It is translated in error and its teachings about salvation are wrong.
a) The Bible is incomplete and has serious translation errors. 'Ignorant translators, careless transcribers, or designing and corrupt priests have committed many error-many plain and precious things were delted, in consequence of which error and falsehood poured into the various churches. One of the greatest heresies of modern Christendom is the unfounded assumption that the Bible contains all of the inspired teachings now extant among men' [Mormon Doctrines, p. 82-83]

3. We must each earn our own salvation. We can become gods.
a) Man may become god. 'Here then is eternal life...to know the only wise and true God; and you have got to learn how to be Gods yourselves, and to be kings and priests to God, the same as all gods have done before you...To inherit the same power, the same glory and the same exaltation, until you arrive at the station of God.' [Joseph Smith, History of the Church, vol. 6, p.306].

4. God was once a man but progressed into godhood. So did our 'Heavenly Mother'
a) God has goddess wives. 'The doctrine that there is a Mother in Heaven was affirmed in all plainness by the First Presidency of the Church.' [Mormon Doctrine, p. 516]

5. All this is known because God sent a prophet in these latter days.