I regret that it has been necessary for me in this lecture to administer a large dose of four-dimensional geometry. I do not apologize, because I am really not responsible for the fact that nature in its most fundamental aspect is four-dimensional. Things are what they are.
Alfred North WhiteheadWhenever a text-book is written of real educational worth, you may be quite certain that some reviewer will say that it will be difficult to teach from it. Of course it will be difficult to teach from it. It it were easy, the book ought to be burned.
Alfred North WhiteheadIt belongs to the self-respect of intellect to pursue every tangle of thought to its final unravelment.
Alfred North WhiteheadPhilosophy begins in wonder. And, at the end, when philosophic thought has done its best, the wonder remains.
Alfred North Whitehead