"I once kept a viper in a sealed glass jar until it died, to observe the effects of air deprivation."

"The true philosopher must be a master of his senses."

"I have often observed that those who are most eager to gain applause, are generally the least deserving of it."

"The more we know of the works of God, the more we shall admire their Author."

"Experiment, without reason, is blind; reason, without experiment, is lame."