And many other signs truly did Jesus in the presence of his disciples, which are not written in this book:
All Commentaries on John 20:30 Go To John 20
Theophylact of Ochrid
AD 1107
To what other signs is the Evangelist referring? To those that Jesus did after the resurrection, and not those before His crucifixion, as one might suppose. The Evangelist is speaking about the signs which Jesus did in the presence of His disciples only. The miracles before the Passion were performed in the presence of the multitude and revealed Jesus to all as the Son of God. The miracles after the resurrection were performed while He was alone with the disciples during the forty days: their purpose was to convince them that He was still the Son of man, with a human body, albeit one now incorruptible, more Godlike, and no longer subject to the laws of the flesh. Of the many miracles after the resurrection, only these are written. They are not described ostentatiously, to vaunt the glory of the Only-begotten, but simply, as the Evangelist says—that ye might believe. So what is the profit here, and to whom does it accrue? Certainly not to Christ, for what does He gain by our belief? It is we who gain. The Evangelist himself tells us that he wrote so that believing ye might have life through Jesus’ name. When we believe that Jesus rose from dead and lives, we win for ourselves eternal life. He arose, and is alive, for our sake. But whoever imagines that Christ is dead and did not rise from the grave has no life in him. Indeed, by thinking this he confirms and ensures his own eternal death and corruption.