'It is I' in the Bible

If it is I who cause you pain, why, who is there to cheer me, except the very person whom I am paining?

For, if we were "beside ourselves," it was in God's service! If we are not in our senses, it is in yours!

Have you all this time been fancying that it is to you that we are making our defense? No, it is in the sight of God, and in union with Christ, that we are speaking. And all this, dear friends, is to build up your characters;