The Light of Christ is the divine energy, power, or influence that proceeds from God through Christ and gives life and light to all things. The Light of Christ influences people for good and prepares them to receive the Holy Ghost. One manifestation of the Light of Christ is what we call a conscience.
The Light of Christ “proceedeth forth from the presence of God to fill the immensity of space.” It is “the light which is in all things, which giveth life to all things, which is the law by which all things are governed” (D&C 88:12-13; see also D&C 88:6-11). This power is an influence for good in the lives of all people (see John 1:9; D&C 93:2). In the scriptures, the Light of Christ is sometimes called the Spirit of the Lord, the Spirit of God, the Spirit of Christ, or the Light of Life. Light of Christ