Attack it Vigorously!
311. As a grass-blade, if badly grasped, cuts the arm, badly-practised asceticism leads to hell.
312. An act carelessly performed, a broken vow, and hesitating obedience to discipline, all this brings no great reward.
313. If anything is to be done, let a man do it, let him attack it vigorously! A careless pilgrim only scatters the dust of his passions more widely.
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/sbe1024.htm