'Watching' in the Bible

and let us consider [thoughtfully] how we may encourage one another to love and to do good deeds,

watching lest there be any one who lacks the grace of God; lest any root of bitterness springing up trouble you, and many be defiled by it;

Continue to follow and be submissive to your leaders, since they are watching over your souls as those who will have to give a word of explanation. By doing this, you will be letting them carry out their duties joyfully, and not with grief, for that would be harmful for you.