"I know not who put me into the world, nor what the world is, nor what I myself am. I am in terrible ignorance of everything. I know not what my body is, nor my senses, nor my soul, not even that part of me which thinks what I say, which reflects on all and on itself, and knows itself no more than the rest. I see those frightful spaces of the universe which surround me, and I find myself tied to one corner of this vast expanse, without knowing why I am put in this place rather than another, nor why this short time which is given me to live is assigned to me at this point rather than at another of the whole eternity which was before me or which will come after me. I see nothing but infinities on all sides, which surround me as an atom, and as a shadow which endures only for an instant and returns no more. All I know is that I must die, but what I know least is this very death which I cannot escape."

--Blaise Pascal, Pensées (1660)