Christian ministry can be hard, thankless, and fatiguing.  You can give everything to the Lord’s work day after day…but see no positive results…you think.  There may even come a time when you’re ready to throw in the towel and chalk it up as pointless and a waste of time.  But think of this…God’s ultimate plan and purpose may be about changing you and not about your work for Him.  You may never see the results you think God wants…but you also may never be fully cognizant of the changes within you because of your diligent work for Him.