Boys and girls should be taught respect for each other's liberty... and that jealousy and possessiveness kill love.
It is only in marriage with the world that our ideals can bear fruit; divorced from it, they remain barren.
Every living thing is a sort of imperialist, seeking to transform as much as possible of its environment into itself . . . When we compare the (present) human population of the globe with . . . that of former times, we see that "chemical imperialism" has been . . . the main end to which human intelligence has been devoted.