Uncertainty Principle

Reading Plato and Descartes, I realised one thing about myself. I realised that I want certainty. I want everything has a text book definition that doesn't allow doubt to creep in. The problem is that almost nothing in our lives are definite. When I read Descartes' first meditation, I laughed (inside) at this guy. How can you live doubting everything ? Wouldn't that diminish the value of, well, everything ?

But then it hit me. This guy was just like me (Well, he was kinda extreme). Like I've said before, I doubt myself and things around me from time to time. If there is something that that doesn't have a proper definition, I'll ask myself again and again, "Is this correct ? Is this wrong ? Is this going anywhere ? Are you sure ?". And when I think about it, is there anything that we are really sure about ? Our lives are already a whole lot of uncertainties. Science is one whole mess of uncertainty (Uncertainty Principle anyone ?). And sadly, so does human relationship.

When I consider this carefully, I found not a single property which with certainty separates the waking state from the dream. How can you be certain that your whole life is not a dream ?
-Descartes