I am indeed rich, since my income is superior to my expenses, and my expense is equal to my wishes.
“Scarce any problem will appear more hard and difficult, than that of determining the distance of the Sun from the Earth very near the truth: but even this... will without much labour be effected.”
“Time spent researching varies from book to book. Some novels require months, even years of research, others very little. I try to do most of my research before I begin but inevitably questions emerge during the writing.”