“Keep your heart with all diligence, for out of it are the issues of life.”
— Proverbs 4:23
There is a large corporation whose motto is “Think.” Well we all think all of the time. God is more specific. In Philippians 8, after giving a list of good and wholesome things, He says think on these things. Don’t just think. Hitler was a man who thought, as was Stalin and Mao and Nero and Judas, but the important thing is not merely to think, but what we are to think about.
Paul says in Philippians 4:9, if we control...