Psalm 25:11 For thy name’s sake, O LORD, Pardon mine iniquity; for it is great.
God is so good to us because He is good. It is not about us but about Him. It is His character. The psalmist knew that when asking for forgiveness it wouldn’t be deserved but would fit with the character of God.
What a wonderful God we serve! How He is known for being so good, so kind. When we ask for things we do not ask telling Him how we deserve anything but rather we pray based on His character and who He is.