And this is the point of ...חבירו בעד המתפלל כל one who davens for someone else and is in need of the same thing will be answered first. For when one davens for his fellow, there is no place for מקטרגים, because he opens a different conduit—the conduit of חנון—since his tefillah is of another caliber. It is about another person.
Similarly, the Kedushas Levi (Rosh Hashanah) teaches that when a person davens, he should never daven with the feeling that he is worthy and deserving—he shouldn’t even think about his mitzvos and positive attributes—rather, he should speak with Hashem and say, “I am nobody. I don’t deserve anything... but You are a חנון.”
The explanation is: If you’re approaching with a sense of being deserving, you will be judged on whether you are truly deserving. But if you come with the understanding and the attitude that the Ribbono shel Olam is a חנון, the prosecutors don’t check whether you’re deserving, because you didn’t come with the attitude of being deserving.
