I think people die but they die only physically and they live with their mind and their results of acts in the world.
They never go.
We can't see them with eyes but they exist.
When teachers help to get human, they live in their students.
When a scientist does a project or invents he or she lives to the end of the world and when a poet say a poem lives with that like an artist lives with his or her artworks.
It is a way that people never forget them and they live in people's mind.