The brain is like a muscle. When Posted on May 19, 2014May 19, 2009 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: good Tags: good, Carl Sagan Spread the love Related posts: A celibate clergy is an especially good A good conscience is a continual Christmas. If you have a particular faith or I like someone who is a little