The Father cannot be described by the things of earth. The Father is all the fullness of the Godhead bodily, and is invisible to mortal sight.

The Son is all the fullness of the Godhead manifested. The Word of God declares Him to be “the express image of His person.” “God so loved the world, that He gave His only-begotten Son, that whosoever believeth in Him should not perish, but have everlasting life.” Here is shown the personality of the Father.

The Comforter that Christ promised to send after He ascended to heaven, is the Spirit in all the fullness of the Godhead, making manifest the power of divine grace to all who receive and believe in Christ as a personal Saviour. There are three living persons of the heavenly trio; in the name of these three great powers—the Father, the Son, and the Holy Spirit—those who receive Christ by living faith are baptized, and these powers will co-operate with the obedient subjects of heaven in their efforts to live the new life in Christ.—Special Testimonies, Series B, No. 7, pp. 62, 63. (1905).

The Pre-existent, Self-existent Son of God—Christ is the pre-existent, self-existent Son of God…. In speaking of his pre-existence, Christ carries the mind back through dateless ages. He assures us that there never was a time when He was not in close fellowship with the eternal God. He to whose voice the Jews were then listening had been with God as one brought up with Him.

He was equal with God, infinite and omnipotent…. He is the eternal, self-existent Son.

From Everlasting—While God’s Word speaks of the humanity of Christ when upon this earth, it also speaks decidedly regarding His pre-existence. The Word existed as a divine being, even as the eternal Son of God, in union and oneness with His Father. From everlasting He was the Mediator of the covenant, the one in whom all nations of the earth, both Jews and Gentiles, if they accepted Him, were to be blessed. “The Word was with God, and the Word was God.” Before men or angels were created, the Word was with God, and was God.

Christ shows them that, although they might reckon His life to be less than fifty years, yet His divine life could not be reckoned by human computation. The existence of Christ before His incarnation is not measured by figures.

Life, Original, Unborrowed, Underived—Jesus declared, “I am the resurrection, and the life.” In Christ is life, original, unborrowed, underived. “He that hath the Son hath life.” The divinity of Christ is the believer’s assurance of eternal life.

With the Father at Sinai—When they [Israel] came to Sinai, He took occasion to refresh their minds in regard to His requirements. Christ and the Father, standing side by side upon the mount, with solemn majesty proclaimed the Ten Commandments.

The Eternal Dignitaries of the Trinity—The eternal heavenly dignitaries—God, and Christ, and the Holy Spirit—arming them [the disciples] with more than mortal energy, … would advance with them to the work and convince the world of sin.

Personality of the Holy Spirit—We need to realize that the Holy Spirit, who is as much a person as God is a person, is walking through these grounds

The Holy Spirit is a person, for He beareth witness with our spirits that we are the children of God. When this witness is borne, it carries with it its own evidence. At such times we believe and are sure that we are the children of God….

The Holy Spirit has a personality, else He could not bear witness to our spirits and with our spirits that we are the children of God. He must also be a divine person, else He could not search out the secrets which lie hidden in the mind of God. “For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.”

The Power of God in the Third Person—The prince of the power of evil can only be held in check by the power of God in the third person of the Godhead, the Holy Spirit.

In Co-operation With the Three Highest Powers—We are to co-operate with the three highest powers in heaven,—the Father, the Son, and the Holy Ghost,—and these powers will work through us, making us workers together with God.

EG, White, Evangelism p.151