It becomes clear that we must begin by becoming one within ourselves. We are dual beings of flesh and spirit, and we sometimes feel out of harmony or in conflict. Our spirit is enlightened by conscience, the light of Christ (see Moro. 7:16; D&C 93:2), and naturally responds to the whisperings of the Holy Spirit and desires to follow truth. But the appetites and temptations to which the flesh is subject can, if permitted, overwhelm and dominate the spirit....
As we endeavor day by day and week by week to follow the path of Christ, our spirit asserts its preeminence, the battle within subsides, and temptations cease to trouble. There is greater and greater harmony between the spiritual and the physical until our physical bodies are transformed, in Paul’s words, from “instruments of unrighteousness unto sin” to “instruments of righteousness unto God” (see Rom. 6:13).

Becoming at one within ourselves prepares us for the greater blessing of becoming one with God and Christ.