Cogito, ergo sum. I think, therefore I am. It is arguably the most famous sentence in all of western philosophy. And it is also – without hyperbole – the single most beautiful thought in the history of humankind. It is the only thought you can have which is certainly true without any hint of doubt. There is simply no other thought like it. It proves itself, in a circular motion, by virtue of what it contains. It is a closed system of perfect confidence.
