1 John 5:11-12

This is the content of God’s testimony. Eternal life is inseparable from the person of Jesus Christ. Some of the false teachers seem to have tried to separate them (cf. 1 John 2:25-26). Jesus Christ and eternal life are one gift from God.

"’Eternal’ life is qualitative, not quantitative; it is the highest kind of spiritual and moral life, irrespective of time, which God enables the believer to share in relationship with Jesus." [Note: Smalley, p. 287.]

1 John 5:12 is not an offer of eternal life, such as John 20:30-31, but a confirmation of what God had done for the readers, as the next verse verifies.