"There is no science which does not spring from pre-existing knowledge, and no certain and definite idea which has not derived its origin from the senses."

"The heart is the household divinity which, discharging its function, nourishes, cherishes, quickens the whole body."

"The greatest happiness is to be able to understand the works of God."

"The studious and good and true, never suffer their minds to be warped by the passions of hatred and envy, which unfit men duly to weigh the arguments that are advanced in behalf of truth, or to apprec…"

"The human body is a machine, but it is also a living soul."