“Or have I passed my time in pouring words like water into empty sieves, rolling a stone up a hill and then down again, trying to prove an argument in the teeth of facts, and looking for causes in the dark, and not finding them?”

“Shall I faint, now that I have poured out the spirit of my mind to the world, and treated many subjects with truth, with freedom, with power, because I have been followed with one cry of abuse ever since for not being a Government tool?”

“Modern fanaticism thrives in proportion to the quanitity of contradictions and nonsense it poures down the throats of the gaping multitude, and the jargon and mysticism it offers to their wonder and credulity.”

“Thus, to give an obvious instance, if I have once enjoyed the cool shade of a tree, and been lulled into a deep repose by the sound of a brook running at its feet, I am sure that wherever I can find a tree and a brook, I can enjoy the same pleasure again. Hence, when I imagine these objects, I can easily form a mystic personification of the friendly power that inhabits them, Dryad or Naiad, offering its cool fountain or its tempting shade. Hence the origin of the Grecian mythology.”

“Travel's greatest purpose is to replace an empty mind with an open one.”

“I am not, in the ordinary acceptation of the term, a good-natured man; that is, many things annoy me besides what interferes with my own ease and interest. I hate a lie; a piece of injustice wounds me to the quick, though nothing but the report of it reach me. Therefore I have made many enemies and few friends; for the public know nothing of well-wishers, and keep a wary eye on those who would reform them.”

“Look up, laugh loud, talk big, keep the color in your cheek and the fire in your eye, adorn your person, maintain your health, your beauty, and your animal spirits.”