Who was the man after God's own heart that God made a promise to in 2 Samuel 7?
David is the man identified as a man after God's own heart in 2 Samuel 7. The context introduces that chapter as another promise, where God is dealing with David, one of the patriarchs. God loved David, and David loved his God, illustrating God's unchanging calling.
Les teaches that after discussing God's promise to Abraham, he directs attention to another promise in 2 Samuel chapter 7. There God is dealing with David, described as another one of the patriarchs and a man after His own heart. The context states that God loved David, and David loved his God. This identifies David as the man after God's own heart in that chapter, and it follows the theme that God's works and calling do not involve His changing His mind.