Looking deep in my mind for this one.
Existence is not necessarily life!
Many will be walking around with this. Just existing but not able to live any more. I does beg to question what life might be or what kind of meaning we like to give it. In reverse it could well be asking if life is an existence in itself? Asking whether existence is enough is just being on a whole other level. Just wreck a brain over it and let me know your thoughts.