Longer Catechism (Orthodox) 27.611

Chapter 27 — Conclusion

Section 611. Q. What caution do we need when we seem to ourselves to have fulfilled any commandment? A. We must then dispose our hearts according to the words of Jesus Christ: When ye shall have done all those things which are commanded you, say, We are unprofitable servants: we have done that which was our duty to do. Luke xvii. 10.