"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…"

"My greatest pleasure was the enjoyment of a serene sky amidst these verdant woods: yet I loved all the changes of Nature; and rain, and storm, and the beautiful clouds of heaven brought their delights…"

"Sorrow only increased with knowledge."

"The fallen angel becomes a malignant devil."

"This, I thought, is power! Not to be strong of limb, hard of heart, ferocious, and daring; but kind, compassionate and soft."