God wants you to know that you are good. That He created you and that you don't need to live in guilt, constantly condemning yourself. Stop listening to the devil when he points out all of your failures.
I had to learn to look past my failures. It's easy to get caught up on what you haven't done correctly and give up. That's what satan wants you to do, to give up God and make you think that it's too hard. It's not too hard. It's only too hard when you make it that way. With God's grace He loves and forgives you. Through Jesus Christ you don't need to beat yourself up anymore.
Is that an excuse to do the wrong thing? No. But God knows your heart. He knows when you try to please Him. When you listen to His voice and speak with Him. In fact, the more you walk in the spirit you no longer desire to do the wrong thing anyway.