'Eternal' in the Bible

But whoever blasphemes against the Holy Spirit will never be forgiven, but is guilty of an eternal sin"

Now as Jesus was starting out on his way, someone ran up to him, fell on his knees, and said, "Good teacher, what must I do to inherit eternal life?"

who will not receive in this age a hundred times as much -- homes, brothers, sisters, mothers, children, fields, all with persecutions -- and in the age to come, eternal life.