What does it mean that Jesus prayed for His disciples but not for the world?

In John 17:9, Jesus states, 'I pray for them; I do not pray for the world but for those whom you have given me, for they are yours.' This distinction is significant in understanding the nature of Jesus' intercessory work. It underlines the Reformed doctrine of limited atonement, which posits that Jesus’ sacrificial death was particularly for the elect, those chosen by God for salvation. This prayer reflects the intimate relationship between Christ and His followers, emphasizing that He upholds and intercedes for them as their Redeemer. The assurance is not merely for all of humanity but for those who are part of His body—the church. Such knowledge provides believers with confidence in Christ's continual advocacy, highlighting His role as a mediator who secures the salvation of His chosen ones.