Everlasting life is the purpose for which was the incarnation of Jesus Christ on earth. It was a sacred invitation that showed us the appearance of our Savior Jesus Christ, who said of Himself, I am life.
Bishop Bishoy of Kafr El-Sheikh and Damietta explained in his article Eternal Life that the Lord Jesus meant by the eternal life the one granted by the Lord Jesus to mankind. Thus, he said that who eats Him will live by Him.
In sin, humanity lost eternal life when Adam fell into eternal perdition of the soul and body. Adam lost the grace given to him when he broke the will of the Lord and ate from Tree of knowledge of good and evil. And Jesus said to them, “I am the bread of life. He who comes to Me shall never hunger, and he who believes in Me shall never thirst. )John 6:35)
The eternal life expressed by John the Apostle when he said That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, concerning the Word of life. The life was manifested, and we have seen, and bear witness, and declare to you that eternal life which was with the Father and was manifested to us. (1 John 1:1-2)
The other apostles touched life when they lived with Jesus Christ saying with St. Paul: Life is Christ.