A chain is no stronger than its weakest link, and life is after all a chain.

I am done with great things and big things, great institutions and big success, and I am for those tiny, invisible molecular moral forces that work from individual to individual, creeping through the crannies of the world like so many rootlets, or like the capillary oozing of water, yet which if you give them time, will rend the hardest monuments of man's pride.

Many persons nowadays seem to think that any conclusion must be very scientific if the arguments in favor of it are derived from twitching of frogs' legs (especially if the frogs are decapitated) and that, on the other hand, any doctrine chiefly vouched for by the feelings of human beings (with heads on their shoulders) must be benighted and superstitious.

Science as such assuredly has no authority, for she can only say what is, not what is not.

Out of time we cut 'days' and 'nights', 'summers' and 'winters.' We say what, each part of the sensible continuum is, and all these abstract whats are concepts. The intelletual life of man consists almost wholly in his substitution of a conceptual order for the persceptual order in which his experience originally comes.

The mind, in short, works on the data it receives very much as the sculptor works on his block of stone.

A great idea goes through three stages on its way to acceptance: 1) it is dismissed as nonsense, 2) it is acknowledged as true, but insignificant, 3) finally, it is seen to be important, but not really anything new.