"The word sinner is a theological designation. It is essential to insist on this. It is not a moralistic judgement. It is not a word that places humans somewhere along a continuum ranging from angel to ape, assessing them as relatively 'good' or 'bad.' It designates humans in relation to God and sees them as separated from God. Sinner means something is awry between humans and God. In that state people may be wicked, unhappy anxious, and poor. Or, they may be virtuous, happy and affluent. Those items are not part of the judgment. The theological fact is that humans are not close to God and are not serving God.
If a pastor finds himself resenting his people, getting petulant and haranguing them, that is a sign that he or she has quit thinking of them as sinners who bring "nothing in themselves of worth" and has secretly invested them with divine attributes of love, strength, compassion, and joy. They, of course, do not have these attributes in any mature measure and so will disappoint him or her every time. On the other hand, if the pastor rigorously defines people as fellow sinners, he or she will be prepared to share grief, shortcomings, pain, failure, and have plenty of time left over to watch for signs of God's grace operating in this wilderness, and then fill the air with praises for what he discovers.