What is the significance of Satan wanting to sift Peter as wheat (Luke 22:31)?

from the old testament

• While we are given very little insight into what happens in the spiritual realm, Job reveals the reality that Satan and God talk at times, where Satan gains permission to inflict specific people with issues. For example, in Job 1:6–12 and Job 2:1–6, Satan receives permission to inflict Job with various trials. While we do not get similar insight into the background of the sifting, because Jesus identifies Satan as the one making the request, a similar heavenly scene may have occurred.
• Notice, however, in Job that Satan could only do what God permitted. He set firm lines that Satan could not cross (cf. Job 1:12; 2:6). Satan is unable to harm anyone without God’s permission, showing that his effect on humanity is controlled.
• The Old Testament also teaches that the righteous are not immune to suffering and that God often uses it to refine His people (e.g., Job 23:10; Psalm 66:10).

from the new testament

• Luke 22:31 reads, “Simon, Simon, behold, Satan demanded to have you, that he might sift you like wheat.” Similar to Satan and God’s conversation about Job, apparently Satan had requested permission to afflict the disciples to scatter them. Notice that the word “you” in this verse is plural. Jesus was saying that Satan had requested “you all” to be sifted.
• However, Jesus then switched to the singular form of “you,” to say that “but I have prayed for you that your faith may not fail” (Luke 22:32a). We can’t say for certain what happened in the heavenly discussion but given that Peter’s fall was more severe than the others and Jesus’ personal address here, Satan was likely given particular permission to sift him.
• Though Satan has been granted permission to sift Peter, Jesus interceded on Peter’s behalf, asking the Father not to allow Peter to fall away completely. Thus, unlike Judas, who sold out Jesus (Matthew 26:14–16) and then killed himself (Matthew 27:3–5), Peter wouldn’t fall all the way. Instead, he would be protected, return to Jesus, and then “strengthen your brothers” (Luke 22:32b).
• Peter, however, known for his self-confidence (cf. Matthew 16:22), asserted that he would never fail Jesus at His time of need, saying “Lord, I am ready to go with you both to prison and to death” (Luke 22:33). Jesus replied by prophesying, “I tell you, Peter, the rooster will not crow this day, until you deny three times that you know me” (Luke 22:34).
• That evening, as predicted, Peter not only ran away with the other disciples (Mark 14:50) but, when confronted three times about being a follower of Jesus, denied any knowledge of or relationship with Jesus (Luke 22:54–60). We then read, “And the Lord turned and looked at Peter. And Peter remembered the saying of the Lord, how he had said to him, ‘Before the rooster crows today, you will deny me three times.’ And he went out and wept bitterly” (Luke 22:61–62).
• Satan had successfully caused the disciples and, in particular, Peter to reject their Lord. However, as Jesus promised, that rejection was not final. After He resurrected, He went and found Peter fishing (John 21:1–3), who, excited at the opportunity to speak with Jesus, jumped into the water (John 21:7). Jesus then lovingly spoke with him, asking whether Peter really loved him (John 21:15–17). He welcomed Peter back, exhorting him to “feed my sheep” (John 21:17), meaning Peter was to strengthen the other believers.
• Soon afterward, Jesus ascended into heaven (Acts 1:9) and, after the Holy Spirit came, Peter boldly preached the first gospel sermon (Acts 2:14), through which God saved three thousand people (Acts 2:41). Throughout the first part of Acts, we then see him as a leading figure in the early church (e.g., Acts 15:7).

implications for today

Peter's sifting reminds us that spiritual battles are real but that they are never outside of God's control. Satan may seek to discourage, tempt, accuse, or shake our faith, yet he can never act beyond the limits God allows. That means believers never face trials alone or without purpose. Even when we cannot understand why God permits suffering, we can trust that He is accomplishing something greater than we can see—strengthening our faith, shaping our character, and preparing us for future service, just as He did with Peter.

This passage also warns us against relying on our own strength. Peter sincerely believed he would never deny Jesus, yet within hours he failed. Confidence in ourselves will always fall short. Our hope is not found in our ability to remain faithful to Christ but in Christ's faithfulness to us. Right now, Jesus is interceding for His people (Hebrews 7:25), the Holy Spirit is strengthening them (Luke 12:11–12), and the Father is holding them securely (John 6:39). Because God is for us, we do not have to live in fear of Satan or in despair over our failures. Instead, we can walk forward with humility and get back up when we fail. Our dependence and confidence in God allow us to move forward, doing the next right thing, knowing that the God who restores broken people is also the God who will faithfully bring every believer safely home.