John 21

Verse 22: "If I want him to remain alive until I return, what is that to you?"

This verse is clarified directly after that Jesus did not say he wouldn't die and then repeats these words.

So, I think it's really cool that it is recorded that Jesus said He'd be coming back. xP

But there is a final sentence in this verse "As for you, follow me" (NLT).

This verse arouse because Peter asked about the other disciple after Jesus told him to follow Him.

When we follow Jesus our eyes are set on Him, not on others. If we turn to look to the right or left we may trip and fall, hit a wall, or get off track. Each path God has set our for us is going to be unique and different, not to mention we may be at different steps along the journey, but the end is the same:

Rom8:28-30 "And we know that in all things God works for the good of those who love him, who have been called according to his purpose. For those God foreknew he also predestined to be conformed to the image of his Son, that he might be the firstborn among many brothers and sisters. And those he predestined, he also called; those he called, he also justified; those he justified, he also glorified."

Being conformed and transformed daily to reflect more of God's image and following in Jesus' example (1Cor3:18); a path of sanctification by the word and Spirit (John 17:17, Gal 5:16).

So what does it matter what happens to a brother in Christ along the journey of walking with God daily?

The answer is different for those who have not yet received this eternal gift (Rom 6:23). We need to care immensely and pray for those who have not heard this good news, and then to go and just show them all that has been done for us and for them, ultimately giving them the choice; a gift held out within arm's reach.