It is the business of a statesman to judge of the expediency of different schemes of economy, and by degrees to model the minds of his subjects so as to induce them from the allurement of private interest to concur in the execution of his plan.

-Steuart (later Denham), SirJames
  Inquiry into the Principles of Political Oeconomy.

The lawyer's truth is not Truth, but consistency or a consistent expediency.

-Thoreau, Henry David
  Civil Disobedience.