“The hours of folly are measured by the clock, but of wisdom no clock can measure.”

“Who knows, the mind has the key to all things besides”

“One must be a wise reader to quote wisely and well”

“The investigation of the meaning of words is the beginning of education”

“Not to unlearn what you have learned is the most necessary kind of learning.”

“Less than fifteen percent of the people do any original thinking on any subject . . . The greatest torture in the world for most people is to think”