The Light of Christ is a doctrine of the Latter Day Saint movement, including The Church of Jesus Christ of Latter-day Saints, that most people would call conscience. This doctrine teaches that the light of Christ "lighteth every man that cometh into the world." (Holy Bible, King James Version, John 1:9) "Wherefore, every thing which inviteth and enticeth to do good, and to love God, and to serve him, is inspired of God." Book of Mormon, Moroni 7:13. The "Spirit of Christ is given to every man, that he may know good from evil." (Moroni 7:16)

As another divine source of inspiration and knowledge of truth, the Holy Ghost himself is a divine personage and member of the Godhead. All people are able to feel the influence of the Holy Ghost from time to time. But repeatedly going against the Light of Christ will eventually make one "beyond feeling" the influence of the Holy Ghost.

The baptism of water spoken by Jesus to Nichodemus was a literal baptism as practiced in the church. The baptism of fire is to receive the Gift of the Holy Ghost, or the opportunity to always feel the Holy Ghost's companionship, as long as one remains worthy of it.