“Conscience is but a word that cowards use,
Devised at first to keep the strong in awe:
Our strong arms be our conscience, swords our law.
March on, join bravely, let us to’t pell-mell
If not to heaven, then hand in hand to hell.”
—William Shakespeare, Richard III, Act 5, Scene 3, lines 336-440.

Sources:
http://www.bartleby.com/70/3353.html
Reblogged this on Massachusetts Appellate Law Blog.