If the whole existence is one, and if the existence goes on taking care of trees, of animals, of mountains, of oceans from the smallest blade of grass
to the biggest star then it will take care of you too.
Why be possessive? The possessiveness shows simply one thing that you cannot trust existence. You have to arrange separate security for yourself,
safety for yourself; you cannot trust existence.
Non-possessiveness is basically trust in existence.
There is no need to possess, because the whole is already ours.