The Christian life is not just difficult to live, it is impossible. In your flesh, you can not do what the Lord has told you to do. He has commanded you to just bear it when someone insults you. If they slap you on the face, you are to turn the other cheek. If they sue you and take away your coat, you are to give them you cloak also (Matt. 5:39-40). Your natural self, independent of God just want do things like that. The Lord told us to do the opposite. Without supernatural help it is impossible to do what Jesus commanded. That is why Paul said "it is no longer me that lives, but Christ who lives through me" (Gal. 2:20).
In your spirit, you have an unlimited ability to forgive, endure, believe and hope. If you catch yourself saying "I can't put up with this person any longer. I just can not take it anymore" What you are really saying is "I have come to the end of my flesh!" That's good! Now let your spirit take over! Pray, Father, I'm sorry, I have been trying to do this in my own strength, that is why I am frustrated and angry. Forgive me and live your life through me. Help me to walk in the spirit so I will not fulfill the lust of the flesh. Then start meditating on who you are in Christ.
That is renewing your mind and releasing the supernatural life of God out of your spirit into your soul and body. When your physical mind comes into agreement with your spiritual mind, you can literally begin to forgive, hope, endure and believe in things that you could not have done by your natural self. In your flesh, you cannot overcome, turn the other cheek or forgive someone who have done you wrong. That is why Paul said of his flesh, "O wretched man that I am, who shall deliver me from this body of death" (Rom. 7:24). In other words, Who will deliver me from this flesh, and the next verse says "I thank God through Jesus Christ our Lord (Rom. 7:25).