I noticed affixed to a laboratory door the following words: "Les théories passent. Le Grenouille reste. [The theories pass. The frog remains.] —Jean Rostand, Carnets d'un biologiste." There is a risk that in the less severe discipline of criticism the result may turn out to be different; the theories will remain but the frog may disappear.

An Appetite for Poetry (ed. Harvard University Press, 1989) - ISBN: 9780674040939