Existence (n.) is spatial: by an inner necessity it opens onto an outside, so we can speak of a mental space.
Existence (n.) has no external or contingent attributes: it cannot be spatial, sexual or temporal without being so through and through — all its problems are concentric.
Existence (n.) is not something that comes causally from antecedent, from one's physical and social environment... it goes toward them and sustains them.
Existence (n.) is indeterminate in itself: not even God could sound our hearts and tell what we owe to nature and what to freedom.
Existence (n.) as a person is intermittent: after the minute into which we wanted to pour our whole life, impersonal time flows again and carries off the feelings that held our resolve.