Psalm 40

This psalm of David took me about 3 minutes to read. I wonder how many sheep young David pulled out of muddy pits before he saw the lesson in this? Did he approach the hole and look down with contempt at the "stupid animal"? Or was he so filled with compassion, because there was no way for that sheep to understand, that he almost broke out in tears. Was there one sheep that was repeatedly in one mud hole after another? I picture David, with the sheep in the fold, struming his lyre recounting a day of rescuing sheep from the muddy spots leftover after the heavy rains. Then he sung how God repeatedly rescues him from all of the trouble that David brought on himself.
Stuart