"A human being in perfection ought always to preserve a calm and peaceful mind, and never to allow passion or transitory desire to disturb his tranquillity. I do not think that the pursuit of knowledge…"

"How mutable are our feelings, and how strange is that clinging love we have of life even in the excess of misery!"

"Beware; for I am fearless, and therefore powerful."

"I ought to be thy Adam; but I am rather the fallen angel."

"One man's life or death were but a small price to pay for the acquirement of the knowledge which I sought, for the dominion I should acquire and transmit over the elemental foes of our race."