John has detached eternal life from the last day and moved it backward into the present through faith in Jesus as God’s Son… both eternal life and resurrection have been in some sense detached from the final day and moved into the present.
Thielman argues that the Fourth Gospel enacts a decisive temporal reversal, relocating eternal life from eschatological futurity into present experience through faith, making it a quality of existence available now.
, Theology of the New Testament: A Canonical and Synthetic Approach, 2005thesis