"Then the LORD sent Nathan to David. . . . "
When David's friend Nathan knocked on his door, David was probably thinking, "Come on in, let's chat a while." Instead, Nathan had a pastoral message that exposed David's sins (of murder and adultery). But notice (above), that "the LORD sent Nathan to David." God did this--not because He hated David--but because He loved him.
When the ministry comes knocking on your door, recognize that, if you are a faithful churchman, the message is ultimately for your good, and for your cleansing. Nathan did not leave David until he (the prophet) had assured David that his sin had been forgiven by God.
[Puritan quote of the day: "A godly man loves that word which most alarms his conscience, and he loves that man who shall awaken a secure conscience." --Christopher Love, in "The Dejected Soul's Cure"]