Just some food for thought ...
"Of whom and of what indeed can I say: "I know that!" This heart within me I can feel, and I judge that it exists. This world I can touch, and likewise judge that it exists. There ends all my knowledge, and the reast is construction. For if I try to seize this self of which I am sure, if I try to define and to summarize it, it is nothing but water slipping through my fingers. I can sketch it one by one all aspects it is able to assume, all those like wise that have been attributed to it, this upbringing, this origin, this ardor ot these silences, this nobility or this vileness. But aspects cannot be added up. This very heart which is mine will forever remain indefinable to me. Between the certainty I have of my existence and the content I try to give to that assurence, the gap will never be filled. Forever I shall be a stranger to myself." -Albert Camus, Myth of Sysyphus