Empowering friends, picking your battles, always checking 
principle with prudence, never overestimating American capacities, but 
never overestimating the enemy’s strength: this is best seen not as a 
strategy for all contingencies but as a disposition, a habit of mind, a 
temperament.
Michael Ignatieff on George Kennan's approach to US foreign policy, America's Melancholic Hero (The New York Review of Books, March 6, 2014).