To summarize what we understand from the Bible:
1) There are sheep in our fold.
Basically, this means that many (hopefully most or all) of our sheep in our fold are saved people, wanting to serve God and please Him in some degree. Our ministry is to serve the sheep working God’s will and desire for them. On the one hand, we should help them grow spiritually, and on the other hand, we should confront their sin, rebuke it, pray for them, and see them get victory over there sins.