Here, (Acts 2) Peter is in the middle of his sermon given during the Jewish festival Shavuot/Pentecost (fifty days following the Passover Festival and The Lord’s Resurrection). Consistent with Jewish sermons Peter’s message is composed primarily of scripture proofs: he attributed the miracle of the various languages they were witnessing as fulfillment of Joel 2;28-32 (vv. 14-21); and in verses 22-36 he presented Jesus as the Messiah in fulfillment of Psalms 16:8-11 and Psalms 110:1.
As with the Shema (Deuteronomy 6:4), Peter called the faithful men of Israel to hear his message: God acted as Jesus’ witness by allowing Him to perform the mighty works, wonders, and signs as a demonstration of His divine power and authority. This same Jesus, which they had crucified by handing Him over to the Gentile authorities, was slain according to the predetermined plan of God. In essence, if the important thing was to find fault there was plenty to be discovered: (1) Jews crucified Him; (2) Gentile authorities lawlessly executed His death sentence; but (3) this was all done according to God’s plan because faith, not fault, was the issue from the beginning of time.
Peter thus quoted from Psalms 16 as the final proof of Jesus’ divinity noting because David (the author of this particular Psalm) had died he must have been referring to someone else when he wrote, “For you will not abandon my soul to Sheol, or let your holy one see corruption” (Palms 16:10). In writing Psalm 16, David was operating in his gift as prophet. Jesus is the only One who conquered death and as a descendant of David, he must be the promised Messiah whom David foresaw and foretold.
The issue of faith over fault remains today. There is enough fault to condemn everyone because everyone has sinned. Faith in Jesus secures both a relationship with God and salvation from the death penalty because He fulfilled the law and conquered death. God promised He would conquer the last enemy by the seed of the woman (Genesis 3:15). His resurrection is proof positive that He is the Messiah (Christ). Do you seek salvation from God through His risen Messiah or find fault with men?