Space and time are not fundamental, information is. Consciousness creates apparent space and dimensionality. Just like when you have a dream, what you are dreaming takes up no space. Your consciousness creates the illusion of space and dimensionality when you dream, the same as when you are awake. Both are information based simulations of physical realities.
The greatest saint, even if he has sacrificed a thousand times all that he held most dear, even his life itself, for love of others, for that of a God, or for a noble ideal, remains a prisoner of death and rebirth if he has not understood that all is a childish game, empty of reality, an illusion of shadows which his own mind projects on the infinite screen of the Void, just as in a dream. The difference is that this dream has continuity and matter, which makes it different enough from our nighttime dreams to fool us. Having a near death experience, deep meditation, childbirth, certain psychotropic drugs, can all induce a brief "waking up" which is usually blissful, although some people see hell instead.