“As iron is eaten away by rust, so the envious are consumed by their own passion.”
~Antisthenes, Greek philosopher
Cited by biographer Diogenes Laërtius, in Lives of the Eminent Philosophers (c. 3rd century C.E.) Book VI, trans. R.D. Hicks, Cambridge, MA: Harvard University Press, 1972 edition; Chapter 1: Antisthenes, No. 5; online via Perseus Digital Library, ed. Gregory R. Crane, Tufts University, www.perseus.tufts.edu