I have a body, closely bound up with myself;
but at the the same time I have, on the one hand,
a clear and distinct idea of myself
taken simply as a conscious, not an extended being;
and, on the other hand, a distinct idea of body,
taken simply as an extended, not a conscious being;
so it is certain that I am really distinct from my body,
and could exist without it.
-Rene Descartes