Eternal ” means “not within any time limit, outside of time and existing without a beginning or end, like spirit”; whereas “everlasting” means “the life which did not always exist but was granted to God and it was forever, running within time, or something similar, which has a beginning but no end.
Anyone who does not believe God has made him out to be a liar, because he has not believed the testimony God has given about his son. And this is the testimony- God has given us Eternal Life and this life is in his son. He who had the son has life- He who does not have the son of God does not have life.
