"The lecturer should give the audience full reason to believe that all his powers have been exerted for their pleasure and instruction."

"The secret of my success is due to my happy facility of being able to draw correct conclusions from imperfect data."

"The human mind is a wonderful thing, and it is capable of doing wonders."

"I have always tried to make my lectures as clear and simple as possible, so that they may be understood by all."

"There's nothing quite as frightening as someone who knows they are right."