"The distinctions of sex are evident in plants, as in animals."

"Man is the measure of all things, but the Creator is the measure of man."

"The American is obstinate, contented, free. He paints himself with red lines and is regulated by custom."

"The world is a book, and those who do not travel read only one page."

"It is not God, but people themselves who shorten their lives by not keeping physically fit."