'It is I' in the Bible

But if we experience trouble, it is in order [to provide] for your comfort and salvation. Or, if we are comforted, it is in order [to provide] for your comfort [also], which enables you to endure patiently the same sufferings we experience.

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

So physical death is [actively] at work in us, but [spiritual] life [is actively at work] in you.

For if we have been beside ourselves, it has been for God's glory; or if we are now in our right senses, it is in order to be of service to you.

It is indeed unnecessary for me to write to you concerning the service to the saints,

It is indeed not expedient for me to boast; I will come to visions and revelations of the Lord.

that he was caught up to Paradise, and heard unutterable words, which it is impossible for a man to speak.

but he told me, "It is enough for you to have my grace: it is in weakness that [my] power is fully felt." So I am proud to boast of all my weakness, and thus to have the power of Christ resting on my life.

I take pleasure then in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ's sake: for when I am afflicted, then it is I have fortitude.

All this time you have been thinking that we are defending ourselves to you. Actually, it is in the sight of God that we have been speaking in Christ; and all for your upbuilding, beloved.