Trinitarianism | The Loud Cry

I am telling you the truth: when you were young, you used to get ready and go anywhere you wanted to; but when you are old, you will stretch out your hands and someone else will tie you up and take you where you don’t want to go.” (In saying this, Jesus was indicating the way in which Peter would die and bring glory to God.) Then Jesus said to him, “Follow me!”
(Joh 21:18-19)

When Jesus made this statement to Peter, it was the third time he had appeared to the disciples after His resurrection. Peter had just told Jesus he loves Him; Jesus, tells him to feed His sheep. Then, Jesus -giving Peter an indication of what lay ahead of him[Peter], in his future- says emphatically “Follow me!”.