A man of genius has been seldom ruined but by himself.

In lapidary inscriptions a man is not upon oath.

There is something in obstinacy which differs from every other passion. Whenever it fails, it never recovers, but either breaks like iron, or crumbles sulkily away, like a fractured arch. Most other passions have their periods of fatigue and rest, their sufferings and their cure; but obstinacy has no resource, and the first wound is mortal.

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.

There is no wisdom in useless and hopeless sorrow.

Other things may be seized by might, or purchased with money, but knowledge is to be gained only by study, and study to be prosecuted only in retirement.

The imaginations excited by the view of an unknown and untravelled wilderness are not such as arise in the artificial solitude of parks and gardens... The phantoms which haunt a desert are want, and misery, and danger; the evils of dereliction rush upon the thoughts; man is made unwillingly acquainted with his own weakness, and meditation shows him only how little he can sustain, and how little he can perform.