Be ye transmuted from dead stones into living philosophical stones.

(alias Eugenius Philalethes), Anima Magica Abscondita (London, 1650), p. 100; translation printed in Works, ed. A. E. Waite (1919), p. xxxi: but cp. Collectanea Hermetica, ed. W. W. Westcott, Vol. 3 (1893), p. 10, where the quotation is attributed to Robert Fludd