A.T. Robertson Commentary 1 John 5:12

"He that hath the Son hath the life; he that hath not the Son of God hath not the life." — 1 John 5:12 (ASV)

Hath the life (εχε την ζωην). The life which God gave (verse 11). This is the position of Jesus himself (John 5:24; John 14:6).