"After these things Jesus shewed himself again to the disciples at the sea of Tiberias; and on this wise shewed he himself." (John 21:1)
In "Word Focus", William Sillings writes:

The word showed (ephanerosen — aorist) in verse 1 means “to make manifest, to make visible.” ... The verb means simply that Jesus appeared to the disciples in bodily form. It seems certain that no theological concept is actually implied. Nevertheless, it may be inferred from the events in this passage that not only did Jesus want to give them assurance of His bodily presence, but more than that, He wanted to help the disciples finally grasp who He really was — the divine Son of God, not just their teacher, not just their rabbi, not just an itinerant preacher, not merely a good leader. He was indeed God in the flesh.

Discussion: What are some similar misconceptions have about Jesus today?
Discussion: What does it mean for Jesus to be God in the flesh?
Source: Miracles of Jesus: Adult Teacher's Insights, page 40.