The brain is like a muscle. When Posted on July 10, 2011July 10, 2006 by admin “The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.” — Carl Sagan Author: Carl Sagan Category: intelligence Tags: intelligence, Carl Sagan Spread the love Related posts: I never threatened him and no Syrian As a former attorney general. I have I am sure that in Canada the Teaching man his relatively small sphere in