Oh... well Christ preached the gospel to the dead in the spirit world. So we would need the spirit to discern the truth for us. 1peter 3. 18 For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit: 19 By which also he went and preached unto the spirits in prison; 20 aWhich sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water This is 1peter 4: 5 Who shall give account to him that is ready to judge the quick and the dead. 6 For for this cause was the gospel preached also to them that are dead, that they might be judged according to men in the flesh, but live according to God in the spirit. but it is an essential doctrine. He that believeth and is baptized shall be saved. Mark16:16 My Favorite is this John 3: 4 Nicodemus saith unto him, How can a man be born when he is old? can he enter the second time into his mother’s womb, and be born? 5 Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. 6 That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. 7 Marvel not that I said unto thee, Ye must be born again. Notice he is speaking of baptism and he says if it doesnt happen then you cannot go to heaven.