He that followeth me shall not walk in darkness, but shall have the light of life. John 8:12. TDG 357.1
The Lord Jesus took upon Him the form of sinful man, clothing His divinity with humanity. But He was holy, even as God is holy. If He had not been without spot or stain of sin, He could not have been the Saviour of mankind. He was a Sin-bearer, needing no atonement. One with God in purity and holiness of character, He could make a propitiation for the sins of the whole world. TDG 357.2
Christ is the light of the world. Through Him light is shining amid the moral darkness. If He were not light, the darkness would not be apparent, because light reveals darkness. The clearer the light, the more manifest the contrast between light and darkness. Let the light be removed, and there is nought but darkness. TDG 357.3
Christ has declared our position. “He that followeth me shall not walk in darkness, but shall have the light of life” (John 8:12). He is Himself the bright and morning Star. He is the Sun of Righteousness, the brightness of His Father's glory. He is the “true Light, which lighteth every man that cometh into the world” (chap. 1:9). A Physician, a Healer, He came to restore the moral image of God that was lost by transgression. TDG 357.4
When Christ abides in the soul by faith, He makes the one who loves Him all light in the Lord. It is true that many who say they believe the truth have only a nominal faith. They are not doers of the Word. They profess to believe, but their profession will not convert them.... TDG 357.5
When Christ dwells in the heart, His presence is apparent. Good and pleasant words and actions reveal the Spirit of Christ. Sweetness of temper is manifested. There is no angry passion, no obstinacy, no evil-surmising. There is no hatred in the heart, because ... ideas and methods ... are not accepted and appreciated by others.... TDG 357.6
When the truth controls the life, there is purity and freedom from sin. The glory, the fullness, the completeness of the gospel plan is fulfilled in the life. The light of truth irradiates the soul temple. The understanding takes hold of Christ.—Manuscript 164, December 14, 1898, “Be Ye Therefore Perfect, Even as Your Father Which Is in Heaven Is Perfect.” TDG 357.7