They do not have any harsh messages about sin. They come with an invitation. It is an invitation from God. We need to listen, to take advantage of the opportunity, the invitation God is extending to us. God may also be calling us to be an angel to invite someone else to experience the presence of God.
Angels come with many messages.
It may be hope in a difficult situation. It may be peace when we feel disturbed. It may be joy when we feel down. We may be the one to bring that message of God. In the case of Joseph he was also asked to trust in someone else.