Forgive me first of all for even attempting this review of "The Principia"...but would any of you attempt to even review the Bible, the Quran or the Bhagvad Gita...??? The Principia is something that should be worshipped not as the work of a mere mortal, but that of the greatest genius of all time... this was the pinnacle of thought, and none since Newton's time has come even close to matching his scientific prowess...forget Einstein, even he did not consider himself worthy of comparison with Newton, for Newton was a theoretician par experimentor par excellence...(Einstein was often apalled by his own poor ability to experiment)..<br>Here was where Newton introduced his theory of gravity and theory of light and his version of the Calculus...but a word of caution...be afraid, DO NOT attempt to learn these subjects from this book...the real purpose of this book is this...to hold it in your hand's and dissolve into tears as you read the mind of the man who came closest to reading God's thoughts...when, years later, Newton was asked how he hit upon his ideas, he replied "By thinking upon them " !! How very helpful, eh..??<br>Buy this book, treasure it, read it if you can, and all the while, remember Alexander Pope's words:<br>"Nature and Nature's laws<br>lay hid in the night;<br>God said 'Let Newton be !',<br>And all was light !"