The Double Path
282. Through zeal knowledge is gotten, through lack of zeal knowledge is lost; let a man who knows this double path of gain and loss thus place himself that knowledge may grow.
Sacred Books of the East, Vol. 10: The Dhammapada and Sutta Nipata,
by Max Müller and Max Fausböll, [1881], at:
http://www.sacred-texts.com/bud/sbe10/sbe1022.htm