Only as you do know yourself can your brain serve you as a sharp and efficient tool. Know your failings, passions, and prejudices so you can separate them from what you see.
Source: In The Ultimate Success Quotations Library, 1997.
-- Bernard Baruch, (Aug 19 1870-1965), US businessman, statesman; He was advisor to several U.S. presidents and special WW II advisor on war mobilization.