John was one of those "sons of Thunder", who formed an inner circle of the Apostles with Peter and James (his brother). He is mentioned in many of the really powerful miracles that Jesus performed, such as raising the dead, healing the sick, and he even was privileged to behold the Uncreated Light of Jesus' Glory on Transfiguration Mount. One thing we often forget is his youth, he was said to be the youngest of the twelve, and is typically depicted in art as not having a beard, due to his youth.
In his Gospel, we see that he outran the impetuous Peter on the way to the suddenly empty tomb and was the first of the two to reach it. This experience changed him profoundly changed him forever. Think of that, a young man, perhaps even a teenagers sees something that changes his life profoundly and forever.
John went on to author three Epistles and a Gospel. He may even have written the book of Revelation, though that is less certain.
The question I have for us, is how would that change us? Would seeing a person we KNEW to be dead come to life again, would that alter our world view? What would be come less important to us?
Shed upon Your Church, O Lord, the brightness of Your light; that we, being illumined by the teaching of Your apostle and evangelist John, may so walk in the light of Your truth, that at length we may attain to the fullness of eternal life, through Jesus Christ our Lord, Who lives and reigns with You and the Holy Spirit, one God, for ever and ever. Amen.