What Does Your Heart Say?

The reigning philosophists, political pundits, and our favorite Disney movies all agree: Just follow your heart. It's basically our culture's catchphrase; and this world (not to mention prison) is full of people trusting their hearts. They are walking in Solomon's footsteps in Ecclesiastes, "I wanted it -- so I got it...and it wasn't enough." (Ecclesiastes 2:10-11, heavily paraphrased.) 
The problem is our heart only tells us what we feel is true -- it doesn't tell us what is true. 
So having failed with his heart, Solomon tried with his head and found out, "Reasoning is endless, and it gets you nowhere." (Ecclesiastes 12:12, heavily paraphrased.)  
The problem is our head tells us what we think is true -- it doesn't tell us what is true. One need only to survey the contradictions between "experts" to demonstrate this point; their minds absorb the same information and come to opposite conclusions.
Having proven all this with his long life and many mistakes, Solomon concluded in Ecclesiastes 12:13-14 what his father David had told him as a young man: "Don't trust your heart. Don't trust your head. Trust and obey God Who is both Love and Judge -- perfect in heart and perfect in head."


What does God say?