Difficult people are like spiritual sandpapers; whom GOD chooses and uses, to rub off the rough edges in our heart, the inner man, perfecting us [Romans 8.28]. Thank GOD for them [Philippians 4.6-7]; they are our bridle, blinder at times to control and bring the best out of us. So be patient, loving and kind with others so that eventually they will become the tools in GOD's hand to bring the Best out of your life for the Glory of GOD.