“Evil communication corrupts good manners. I hope to live to hear that good communication corrects bad manners.”

“Presumption should never make us neglect that which appears easy to us, nor despair make us lose courage at the sight of difficulties.”

“Standing at my door, I heard the discharge of a gun, and in four or five seconds of time, after the discharge, the small shot came rattling about me, one or two of which struck the house; which plainly demonstrates that the velocity of sound is greater than that of a cannon bullet.”

“The colour of the skin is in no way connected with strength of the mind or intellectual powers.”

“Evil communication corrupts good manners. I hope to live to hear that good communication corrects bad manners.”