Acts 9:20 And immediately he proclaimed Jesus in the synagogues, that this One is the Son of God. (22) …that this One is the Christ.
John 20:31 But these have been written that you may believe that Jesus is the Christ, the Son of God, and that believing, you may have life in His name.
In Acts 9 Paul set up a very good pattern for our gospel preaching today. No matter what portion of the Bible we may use in preaching the gospel and no matter what the subject of our preaching may be, we must always emphasize these two aspects of Christ. We need to preach both the Person of Christ and the work of Christ. We need to emphasize the fact that the One we preach is divine. He is the Son of God, and His source is divine. We should also emphasize His work as the One anointed by God to carry out His commission. This means that we should preach the Son of God and the Christ.
Here [in John 20:31] we see that in order to have eternal life, we need to believe that Jesus is the Christ and that He is the Son of God. We need to believe in His divine Person as the Son of God and in His work, as the anointed One of God. The title “the Christ” is related to the Lord’s work, to His office and mission. The title “the Son of God” denotes the Lord’s Person. His Person is a matter of God’s life, and His mission is a matter of God’s work. He is the Son of God to be the Christ of God. He works for God by the life of God so that man also, by believing in Him as the Christ and the Son of God, may have God’s life and thereby become a child of God.