This is about Christ’s ultimate sacrifice; he suffered God’s rejection so that we never would. God does not forsake us, but even faithful Christians sometimes feel that he has. Mother Teresa started humanitarian centers in over 100 countries, however she also wrote extensively about not feeling God’s presence. I believe this powered her attempts to “Share in Christ’s Sufferings.” Sadly, those attempts did not alleviate her doubts.
Faith cannot be worked up; it is God’s gift for us to receive or to reject. To share in Christ’s sufferings we only need to live life, which is full of suffering. Jesus suffered as you do. If he had not become a man, he would never have experienced suffering. Jesus chose to become a man to share our pain. Whatever pain you are experience, Jesus experiences it with you. He became a man so he could be close to you, to intimately share in your life. He is close to you. The pain you feel now is not the end. You are not alone.
Now if we are children, then we are heirs--heirs of God and co-heirs with Christ, if indeed we share in his sufferings in order that we may also share in his glory.