Psalm 86:11-13.
Teach me Thy way, O LORD; I will walk in Thy truth: unite my heart to fear Thy Name.
I will praise Thee, O Lord my God, with all my heart: and I will glorify Thy Name for evermore.
For great is Thy mercy toward me: and Thou hast delivered my soul from the lowest hell.
How can one’s heart NOT be united with itself? As I pondered this, I thought of two little children playing in the same room, though not playing together. Whatever the younger one picked up, the older one immediately demanded to have it. He kept one hand on the toy he’d already been playing with while he held on tight to the toy he’d just taken away from the younger child. The younger child, apparently used to the “MINE!” behavior of the older, simply picked up another toy. The older child immediately demanded to have it, letting go of the toy he’d recently taken from the younger. As he grabbed the newer choice, he of course had to let go of the one he’d already taken. The younger child calmly recaptured his original toy and walked away with it, leaving the older child frustrated and angry. By the way, these were not my children. I was observing all this while having coffee with their mother, who was not in the least concerned.
The older child had a divided heart. He wanted the toy he already had. He wanted the toy his brother had. He wanted ALL the toys, all the time, and his brother had already learned to manipulate the situation to his own benefit.
We have divided hearts, too. We want to serve God; we want to follow Him and observe His Word. However, we also want to satisfy our own desires, even when they run contrary to God’s ways.
David was simply asking God to bring all the desires of his own heart into compliance with God’s desires for David.
We have such a merciful God. His patience, it seems to me, should grow very thin at times when He observes His people struggling with themselves and with each other, and with Him, because of their divided hearts.