Is death a form of existence? If the opposite of existence is non-existence, then the opposite of to exist is not to exist. Even for the scientist who does not believe in the afterlife, there is a belief in matter. A person who dies does not cease to exist. At the very least, their corpse simply changes its form of matter. So, whether in life or death, we exist.
Or do we?
I don’t think it is possible to conceive of non-existence. Every aspect of the thinking process engages contradiction.
The greatest miracle is not resurrection, it is coming into being.