“Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God;”
King James Version (KJV)
3:5 Not that we are sufficient of ourselves - So much as to think one good thought; much less, to convert sinners.
2Co 3:5 Not that we are sufficient by ourselves. He would claim no credit for the work at Corinth, as though it was his own, for all his strength was of God.