JMNT(i)
12 The one continually holding (or: constantly having; progressively possessing) the Son continuously holds (constantly has; progressively possesses) the Life. The person not continuously holding (constantly having) God's Son does not now have (or: hold) the Life. [comment: it seems that the Son is the Life]
13 I write these things to you folks to the end that, having seen, you may know that you are presently holding (you folks constantly and continuously have) Life pertaining to, and having the qualities of, the Age (life whose source is the Age [of Messiah]; or: eonian life; Life of, for and on through the ages) – for the folks (or: in and among the ones) continuously believing and putting their trust, confidence and reliance into the Name of God's Son.