The ultimate and certain hope of Christians is that God will raise us from death and give us a new body, like the one Jesus has, so that we might live on a restored Earth with Him forever. In 1 Thessalonians, the Apostle Paul reminds believers who have had loved ones die of this great hope and then says "comfort one another with these words".
In that spirit, I had the honor and privilege of giving the exhortation at the memorial service of a mentor and dear friend Bob Falkner who died from cancer in April 2017. Bob was 70.
For a transcript with Scripture references, see the "notes" link.