Another account of the shortness of our reason, and easiness of deception, is the forwardness of our understandings assent to slightly examined conclusions.
Whosoever deceives a man makes him ruin himself; and by causing an error in the great guide of his actions, his judgment, he causes an error in his choice, the misguidance of which must naturally engage him to his destruction.
Let those consider this who look upon it as a piece of art, and the masterpiece of conversation, to deceive and make a prey of a credulous and well-meaning honesty.
Let the measure of your affirmation or denial be the understanding of your contractor; for he that deceives the buyer or the seller by speaking what is true in a sense not understood by the other, is a thief.