“Our disputants put me in mind of the scuttle fish, that when he is unable to extricate himself, blackens all the water about him, till he becomes invisible”

“The man who never alters his opinions is like standing water, and breeds reptiles of the mind”

“Thought means life, since those who do not think so do not live in any high or real sense. Thinking makes the man”

“Cheerfulness keeps up a kind of daylight in the mind, filling it with a steady and perpetual serenity”

“A contented mind is the greatest blessing a man can enjoy in this world”

“Reading is to the mind what exercise is to the body”