A significant portion of Revelation 7 (and Revelation as a whole) describes scenes from heaven. A non-Christian might say, “I have enough problems to deal with now. Don’t bother me with the hereafter!”
Eternal life adds great significance to our life on earth. What sense is there in suffering ridicule because we identify ourselves with Christ? What sense is there in using our minds or our money for Christian causes? Why not be like everyone else and go after money, fame, pleasure, and leisure? The assurance we have of life everlasting and an eternal home with the Lord gives purpose, meaning, direction, and perspective to our lives here and now.
It is also relevant because we are never prepared to live until we are prepared to die. How can we experience life to the fullest knowing that tomorrow a doctor may diagnose a lump as malignant and give us three months to live? How can we be excited about the future with the realization that we may die suddenly in an automobile accident? Having eternal life changes our perspective. A terminal condition becomes temporary. Death separates two Christians for only a limited time.
The relevance of eternal life to life today need not stop there. Eternal life consists of the Person of God Himself taking up residence within us. Imagine that—God Himself living in us! We will live forever! We have not given Him our lives; He has given us His.
As Paul wrote to the believers in Galatia, “I have been crucified with Christ; it is no longer I who live, but Christ lives in me; and the life which I now live in the flesh I live by faith in the Son of God, who loved me and gave Himself for me” (Gal. 2:20).
A Christian looks forward to being with the Lord in heaven, but enjoys His presence and its benefits now. Eternal life has every relevance to life lived today—so much so that without it, there is no full life now.