Eternal life is much more than unending life.  It is literally the quality of the life of the eternal God that is shared with us.  Eternal life is not something we possess apart from an interlocked solidarity with the One who is life (Romans 6:23b).  It is the life of abiding in Him and Him in us (John 15).  “When Christ, who is our life, is revealed, then we also will be revealed with Him in glory” (Colossians 3:4).  Eternal life is our gift inside the Son.

 “And the testimony is this, that God has given us eternal life, and this life is in His Son.  He who has the Son has the life; he who does not have the Son of God does not have the life.” 1 John 5:11-12 (NASB) 

You are reading from the book, “In The Steps of The Shepherd”, by H. Lamar Smith