"Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh; And declared to be the Son of God with power, according to the spirit of holiness, by the resurrection from the dead." (Romans 1:3-4)
It is noteworthy that the identification of Jesus Christ as the Son of God is directly associated with His resurrection from the dead. "The last enemy that shall be destroyed is death" (1 Corinthians 15:26), and since only God Himself can conquer death, Christ’s bodily resurrection is the conclusive affirmation of His unique deity: "Thou art the Christ, the Son of the living God" (Matthew 16:16). Many others have claimed divine sonship, but all are dead--only Christ validated that claim by defeating death. "God . . . hath raised up Jesus again; as it is also written in the second psalm, Thou art my Son, this day have I begotten thee" (Acts 13:33). "Death is swallowed up in victory . . . . through our Lord Jesus Christ" (1 Corinthians 15:54, 57).
Jesus is explicitly called "the Son of God" about 44 times in the New Testament, only half as often as He is called "Son of man." Nevertheless, this great truth is clearly taught in numerous other ways than by the use of the title itself. It is so important that there is no salvation for the one who denies it. Jesus said plainly, "He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God" (John 3:18).
Because He lives, we who believe on His name will also live forever! "Who is he that overcometh the world, but he that believeth that Jesus is the Son of God? . . . He that hath the Son hath life; and he that hath not the Son of God hath not life. These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life" (1 John 5:5, 12-13). HMM
