Luke placed this event next probably because of its logical connection with Jesus' preceding comment about the disciples remaining faithful to Him during His past trials. That would not continue. However, he did not record Jesus' announcement that all the disciples would desert Him (Matt. 26:31; Mark 14:27). Perhaps he did not do so because it presents a negative picture of disciples generally. They all proved unfaithful, but only temporarily. Luke wanted to encourage his disciple readers, not discourage them.
22:31 Jesus apparently put Peter's testing, which Jesus knew was coming in view of His own arrest and trials, in a cosmic setting because Satan was ultimately responsible. Jesus viewed what would happen to Peter similarly to what had happened to Job (Job 1:6-7). Sifting as wheat pictures Satan's attempt to separate Peter's faithfulness to Jesus from him. The Greek word translated "you"(hymas) is in the plural indicating that Simon was not the only disciple whom Satan desired to sift. Probably Jesus used the name "Simon,"Peter's given Jewish name, because it pictured Peter in his natural state, not as Peter the rock. He probably repeated it in pathos anticipating the sad consequence of Satan's testing.
22:32 Jesus had already counterattacked Satan by praying to God for Peter (singular "you,"sou) and presumably for all the other disciples (cf. Rom. 8:34; Heb. 7:25). Jesus described Peter's faith as being stretched to its limit. He was confident that Peter would survive this attack with God's help. His confidence indicates the superior power of Jesus over Satan in spiritual warfare. When he did turn back (Gr. epistrepho) to Jesus, Peter would need to help his brother disciples whose faith Jesus' betrayal, arrest, trials, crucifixion, death, and burial would challenge (cf. John 21:15-17; 1 Thess. 3:2, 13; 1 Pet. 5:10; et al.). Jesus implied that Peter would turn away from Him temporarily. When Peter objected to this assumption, which he considered insulting (v. 33), Jesus said frankly that Peter would deny Him (v. 34). Evidently Jesus singled Peter out from the other disciples, all of whom needed God's help in withstanding temptation, because of his leading role. He would be able to help the other disciples recover (cf. Acts 1:15; et al.).
Peter had a responsibility even though Jesus prayed for him. Prayer and action are not mutually contradictory but complimentary.
22:33-34 Peter's commitment to Jesus was admirable. Luke alone recorded that Peter promised to die with Jesus, and he made no reference to the other disciples. Nonetheless, Peter overestimated his own ability to remain faithful when persecuted. Luke is also the only evangelist who mentioned that Jesus told Peter that he would deny that he even knew Jesus. "Rocky"would hardly behave as a rock. His overconfidence should be a warning to every disciple.