Philosophy will clip an Angel's wings. — John Keats

Keats, John. "Lamia." John Keats: The Major Works, edited by Elizabeth Cook. Oxford University Press, 2009, pt. 2, I. 234.

Keats, John. "Lamia." Lamia, Isabella, the Eve of St Agnes and Other Poems. London: Taylor and Hessey, 1820, pt. 2, I. 234.