King James Version
Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.English Standard Version
Keep a close watch on yourself and on the teaching. Persist in this, for by so doing you will save both yourself and your hearers.New International Version
Watch your life and doctrine closely. Persevere in them, because if you do, you will save both yourself and your hearers.