Psalm 34:1b "...I will bless the LORD at all times: his praise shall continually be in my mouth."
Do I deserve God's goodness toward me? Absolutely not!! I fail Him every single day and most days....not just once but many times. Yet He remains faithful to forgive when I ask Him and He comes right back and blesses me again and again.
He knows my frame and He knows I'm capable of messing up. The key is to my realizing when I mess up (and if you are right with Him and walking close to Him you will know when you do) and confessing it to Him and making it right. He will certainly let us know when we don't...life will be come a bit more difficult when we don't confess it and make it right. And the longer we go without doing that the more difficult things will become.
So WHEN you mess up (and we all do!!!)....confess it immediately and make it right and you will see God's blessings continue to pour out upon your life!!!