'Fear and Trembling' in the Bible

So then, my dear ones, just as you people were always obedient [to my teaching] when I was there with you, so now, in my absence [also], be [obedient] all the more. [Continue to] complete your own salvation [i.e., by living faithfully to the end. See Rom. 13:11] with fear and trembling [i.e., with a reverent and submissive spirit],