The book of Proverbs, written by Solomon, the wisest man in human history, gives good advice on a wide variety of subjects. One is “Guard your heart above all else; for it determines the course of your life” (4:23 NLT). One commentator says this about the heart – It “is the center of the intellect,” “the center of the emotions”, and “...the heart is the center of the human will” (FireBible, NLT, p…