we fail to model grace, to encourage grace, to believe in grace, to live with grace, and to share grace with others, we’ll fall on our faces and backslide into worldliness. The second warning is: Don’t allow bitterness to take root (Heb. 12:15). The author employs the image drawn from Deuteronomy 29:18, where the people of Israel were warned about “a man or woman, or family or tribe, whose heart turns away today from the LORD our God … that there will not be among you a root bearing poisonous fruit.”