In a great city in our world, there stands a memorial to those who died in two world wars. Sculptured in stone is a soldier dying on the battlefield, and two angels are lifting him up to eternal life. If it dies it brings forth much fruit. His life isn't over, it will go on being fruitful in heaven. Life is not going to last forever on this earth.
Some people are frightened of that fact, and many try to avoid it for as long as possible.
They don't think about it unless they are forced to, but sensible people know that death is inevitable. It might be pushed into the future a little by eating the right foods or taking lots of exercise or trusting a particular doctor. The length of time is relative. We are born to die. This body we live in has the stamp of time on it, and it was made, like the grain of wheat, to fall into the ground.