Know yourself and your enemy and you will be victorious in over hundred battles. 
»Advertising is the art of aiming for the head and hitting the wallet.« Vance Packard, 1989
»Aim for the heart to hit the heads of others.« The War of Art Directors, 2010

Knowing heaven and earth completes your victory. 
»The best way to have a good idea is having a lot of ideas.« Linus Carl Pauling
»The right strategy makes a good idea into a perfect idea.« The War of Art Directors