Just as man must reveal his mind to all others before they can know it, so must God reveal his mind to man before he can know it. How was this accomplished? This is done by the Holy Spirit (1 Cor. 2:13).
All revelation comes from the mind of God. Jesus said, “He that rejects me, and receives not my words, hath one that judges him: the word that I have spoken, the same shall judge him in the last day. For I have not spoken of myself; but the Father which sent me, he gave me a commandment, what I should say, and what I should speak. And I know that his commandment is life everlasting: whatsoever I speak therefore, even as the Father said unto me, so I speak” (Jn. 12:48-50).
All of the old testament was written and revealed this same way. Peter wrote, knowing this first, that no prophecy of Scripture is of any private interpretation, for prophecy never came by the will of man, but holy men of God spoke as they were moved by the Holy Spirit” (2 Pet 1:20,21).
God the Father has exalted Jesus Christ at his own right hand and made him both Lord and Christ (Acts 2:33,36). He gave him all authority in heaven and on earth (Matt. 28:18). God speaks to us now only through or in his Son, Jesus Christ. “God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets, hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds” (Heb. 1:1,2).
Christ speaks to us through the apostles whom he had chosen for that work. Before he ascended into heaven, he told the apostles not to depart from Jerusalem, but to “wait for the promise of the Father, which, he says, you have heard of me” (Acts 1:4). He said to them: “But you shall receive power, after that the Holy Spirit is come upon you: and you shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth” (Acts 1:8).
God gave all authority to Christ when he ascended to his right hand in heaven. Christ speaks through the Holy Spirit (Jn. 14:26; 16:13). After he had ascended into heaven, he gave commandments to the apostles whom he had chosen.
I want you to notice that God “speaks” by or in his Son to this age. He used “words” when he spoke by his Son. On the day of Pentecost the Holy Spirit gave the apostles “utterance” to make known the mind of God.
As Christ “speaks” with the authority given to him, he must also use words. He said, “the words that I speak unto you, they are spirit, and they are life” (Jn. 6:63). He said the words he spoke to the apostles while he was with them were not of himself, but of the Father (Jn. 14:10). Then he said: “If you love me, keep my commandments” (v. 15). Jesus teaches the relationship of his disciples to him in the parable of the vine and the branches (Jn. 15:1-6). Verse 7 says: “If you abide in me, and my words abide in you, you shall ask what ye will, and it shall be done unto you.” Jesus said, “Heaven and earth shall pass away, but my words shall not pass away” (Matt. 24:35). Finally, he said those who reject him, and receive not his words, will be judged by his words in the last day (Jn. 12:48).
The word which the Father has spoken by his Son is revealed by the Holy Spirit to the apostles. Just before he ascended into heaven, Jesus said to them: “And, behold, I send the promise of my Father upon you; but tarry you in the city of Jerusalem, until he be endued with power from on high” (Lk. 24:49 f; Acts 1:8). Jesus told his apostles that the Comforter, “which is the Holy Spirit, whom the Father will send in my name, he shall teach you all things, and bring all things to your remembrance, whatsoever I have said unto you” (Jn. 14:26). He also told them that when the Spirit of truth came, “he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will show you things to come” (Jn. 16:13). The Holy Spirit does not speak of himself: from his own mind; whatsoever he hears, that is what he speaks.
In Acts 1:2 the inspired record tells that Christ, who has all authority, gives commandments unto the apostles “through the Holy Spirit.” Acts 2:1-4 reveals that the Holy Spirit came upon the apostles on Pentecost following the resurrection of Christ, “And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.” Christ gives the commands, the Holy Spirit reveals it by words in the mouths of the apostles. They spoke it and they wrote it (1 Cor. 2:13 ff; Gal. 1:11,12; 1 Thess. 2:13; 1 Cor. 2:13; 14:37; Eph. 3:1-4; 2 Pet. 3:15, 16). This is how the gospel was preached and the doctrine of Christ was kept. Anyone who goes beyond what was revealed and written was and is in direct violation of God’s commandment not to do beyond what was written by the apostles (1 Cor 4:6).