John 21 concerns the appearance of the risen Jesus to seven of his disciples while out fishing and then on the beach. When they disciples saw him from their boat while out fishing they saw him as a stranger. When Jesus enabled them to bring in a great catch of fish, they saw him as their Lord. When Jesus carefully and gently reinstated Peter, they saw him as their friend. When Jesus then commissioned them to ‘follow him’, he made it clear they should serve him as their Lord