John 21:21 from the King James Version of the Bible reads, "Peter seeing him saith to Jesus, Lord, and what shall this man do?"

This verse is a part of the larger story in the Gospel of John where Jesus appears to his disciples after his resurrection. In this specific scene, Jesus has just finished speaking with Peter and has told him about his future death and the way in which he will glorify God. After this, Peter turns and sees the disciple whom Jesus loved (typically understood to be John) following them. He then asks Jesus what will become of this disciple. This question is prompted by Peter's desire to know what the future holds for John, especially in light of what Jesus has just told him about his own future.

In this verse, there are a few key themes and lessons that can be gleaned. One prominent theme is the idea of comparison and envy. Peter's question to Jesus betrays his comparative mindset – he is concerned with what will happen to John in relation to himself. This reflects a very human tendency to compare ourselves with others and to be concerned with how others are faring in comparison to ourselves. This attitude is often rooted in envy and a lack of contentment with our own circumstances. Jesus' response to Peter's question, which essentially tells Peter not to worry about John's future but to focus on his own, serves to redirect Peter's focus away from comparison and onto his own journey and relationship with Christ.

Another theme in this verse is the concept of individual paths and callings. Jesus' response to Peter implies that each person has their own unique path and journey with God. Rather than being preoccupied with the fate of others, we are encouraged to focus on our own relationship with God and the specific calling He has for us. This is a reminder that God has a plan for each of us, and our energy is best spent discerning and following that plan rather than comparing ourselves with others.

The larger context of this verse – the appearance of Jesus to his disciples after his resurrection – adds significant depth to its meaning. This scene serves as a powerful demonstration of Jesus' continued presence and care for his disciples even after his death. It also reinforces the idea that Jesus is concerned with the individual circumstances and journeys of each of his followers. This is a comforting and reassuring message for believers, reminding them that they are not alone and that Jesus is intimately aware of their concerns and questions.

Symbolically, the exchange between Peter and Jesus in this verse can be seen as representing the broader human tendency to become fixated on the future and the fate of others, rather than focusing on our own connection with God. It can also be interpreted as a reminder to trust in God's plan for each of our lives, even when we may not fully understand it.

In conclusion, John 21:21 is a thought-provoking and instructive verse that addresses the human tendency to compare ourselves with others and worry about their outcomes, as well as the importance of focusing on our own relationship with God and trusting in His unique plan for us. It serves as a reminder of Jesus' personal care for each of his followers and the individual paths and callings that He has for them.