Everyone and everything is composed of atoms and molecules and particles that used to help compose something else. There are particles in me that used to be rock, and the sea, and other people. When did those particles stop being what they were and start being me? The delusion is in the distinction- there is no 'was and is'. Each particle just is, always, past and future. If once it was rock, it still is. If once it was another person, it still is, and is me at the same time, as well as just part of the larger organism we call earth. And, by extension, the universe. By this we know that all is one.
This view completely extinguishes many things (or can, if we let it in)
Everything is vitally important,
and nothing matters.