A person loves to review his own mind. That is the use of a diary, or journal.

It matters not how a man dies, but how he lives.

Among the innumerable mortifications which waylay human arrogance on every side may well be reckoned our ignorance of the most common objects and effects, a defect of which we become more sensible by every attempt to supply it. Vulgar and inactive minds confound familiarity with knowledge and conceive themselves informed of the whole nature of things when they are shown their form or told their use; but the speculatist, who is not content with superficial views, harasses himself with fruitless curiosity, and still, as he inquires more, perceives only that he knows less.

Our minds, like our bodies, are in continual flux; something is hourly lost, and something acquired.... Do not suffer life to stagnate; it will grow muddy for want of motion: commit yourself again to the current of the world.

I am not yet so lost in lexicography, as to forget that words are the daughters of the earth, and that things are the sons of heaven. Language is only the instrument of science, and words are but the signs of ideas: I wish, however, that the instrument might be less apt to decay, and that signs might be permanent, like the things which they denote.

Pain is less subject than pleasure to careless expression.

Waste cannot be accurately told, though we are sensible how destructive it is. Economy, on the one hand, by which a certain income is made to maintain a man genteelly; and waste, on the other, by which on the same income another man lives shabbily, cannot be defined. It is a very nice thing; as one man wears his coat out much sooner than another, we cannot tell how.