'Eternal' in the Bible

but whoever may blaspheme against the Holy Spirit never has forgiveness, but is guilty of an eternal sin"

As he was going out into the way, one ran to him, knelt before him, and asked him, "Good Teacher, what shall I do that I may inherit eternal life?"

but he will receive one hundred times more now in this time, houses, brothers, sisters, mothers, children, and land, with persecutions; and in the age to come eternal life.