Time without beginning or end; forever.
Consider a timeline that goes an infinite distance into the past and an infinite distance into the future; this is a mathematical picture of eternity.
Followers of Jesus will spend a future eternity with him in heaven. Since God is bound by neither space or time — he exists outside the space-time continuum — eternity with him is not an unrealistic promise.
Key verse about Eternity: Your throne was established long ago; you are from all eternity (Psalm 93:2, NIV).
A lifelong student of the Bible, Peter DeHaan, PhD, wrote the 700-page website ABibleADay.com to encourage people to explore the Bible. His main blog and many books urge Christians to push past the status quo and reconsider how they practice their faith in every area of their lives.