Not Done Yet
The advantage of age is scars. Scars earned by valor or dumbness. Scars accumulated over time. David was a scar-filled person in so many ways. He made his share of dumb mistakes and yet he was a man after God's heart.
A wise older believer will give eloquent wisdom of learning to find spiritual shelter from the storm. David called God his "rock of refuge" and was committed to sharing that truth with the upcoming generation.