Very truly I tell you, a time is coming and has now come when the dead will hear the voice of the Son of God and those who hear will live.26 For as the Father has life in himself, so he has granted the Son also to have life in himself. (John 5:25-26)
Jesus has “life in himself” because he is the Son of God. You and I do not have life in ourselves. On our own, cut off from God, we have only death. We need to obtain life from God, whereas God already has life in himself.