'It is I' in the Bible

My brothers, what profit is it if a man says he has faith and does not have works? Can faith save him?

and one of you may say to them, Go in peace, be ye warmed, and be ye fed; and give them not the necessaries of the body; what profit is it?

In the same way the tongue is an insignificant part of the body, but it is immensely boastful. Remember how a mere spark may set a vast forest in flames.

Or do you suppose that it is in vain that the Scripture says, "The spirit which has its home in us yearns over us unto jealousy?"

But, as the case stands, it is in mere self-confidence that you boast: all such boasting is evil.

Your gold and silver have rusted and their rust will be a witness against you. It will consume your flesh like fire. It is in the last days that you have hoarded treasure!