Some of the greatest advances in mathematics have been due to the invention of symbols, which it afterwards became necessary to explain; from the minus sign proceeded the whole theory of negative quantities.

The course of every intellectual, if he pursues his journey long and unflinchingly enough, ends in the obvious, from which the non-intellectuals have never stirred.

To the exponents of the Perennial Philosophy, the question whether Progress is inevitable or even real is not a matter of primary importance. For them, the important thing is that individual men and women should come to the unitive knowledge of the divine Ground, and what interests them in regard to the social environment is not its progressiveness or non-progressiveness (whatever those terms may mean), but the degree to which it helps or hinders individuals in the their advance towards man's final end.

The soul of wit may become the very body of untruth. However elegant and memorable, brevity can never, in the nature of things, do justice to all the facts of a complex situations. On such a theme one can be brief only by omission and simplification. Omission and simplification help us to understand - but help is, in many cases, to understand the wrong thing; for our comprehension may be only of the abbreviator's neatly formulated notions, not of the vast, ramifying reality from which these notions have been so arbitrarily abstracted.

Most vices demand considerable self-sacrifices. There is no greater mistake than to suppose that a vicious life is a life of uninterrupted pleasure. It is a life almost as wearisome and painful -- if strenuously led -- as Christian's in The Pilgrim's Progress.

The thin and precarious crust of decency is all that separates any civilization, however impressive, from the hell of anarchy or systematic tyranny which lie in wait beneath the surface .

Chronic remorse, as all the moralists are agreed, is a most undesirable sentiment. If you have behaved badly, repent, make what amends you can and address yourself to the task of behaving better next time. On no account brood over your wrongdoing. Rolling in the muck is not the best way of getting clean.