"Why did nature not ordain that one animal should not live by the death of another? Nature, being inconstant and takin…"

"[O mighty and once living instrument of formative nature. Incapable of availing thyself of thy vast strength thou has…"

"Man and animals are really the passage and the conduit of food, the sepulchre of animals and resting place of the dea…"

"[N]ature appears with many animals to have been rather a cruel stepmother than a mother, and with others not a stepmo…"

"I, then, will load my humble pack with this despised and rejected merchandise, the refuse of so many buyers; and will…"

"Many will think they may reasonably blame me by alleging that my proofs are opposed to the authority of certain men h…"

"Il cuor non spaglia."

"Just as courage imperils life, fear protects it."

"Fear arises sooner than anything else."

"Wherever good fortune enters, envy lays siege to the place and attacks it; and when it departs, sorrow and repentance…"