Deuteronomy 29:18-29
Up to now the subject has been the people as a whole. Vv. 18-21 apply to the individual, the man or woman who turns away from the LORD. Wormwood (v. 18) is a plant with bitter and poisonous juices which grows in uncultivated places. If our hearts are in "a wild state" we should not be surprised if certain roots of bitterness do not develop there, poisoning our spirits with all sorts of resentment, jealousy and animosity. The cure to prevent this according to Hebrews 12:15 is: do not fail to enjoy the grace of God.
The chapter closes on a comforting verse. Our history, like that of Israel, consists of a visible side: that which we are responsible for, and a hidden side: that of grace, of which God alone has full knowledge. Certain tapestries are embroidered back to front. While the work is going on, one can only see knots and tangled threads on the canvas; only the craftsman knows what he is doing. Afterwards when the work is completed, the final pattern emerges on the other side in all its perfection and beauty. "The things revealed" correspond to the reverse side of the divine work made visible. Afflictions, checks, discipline, at times appear to us to be going against God’s plan. But soon, in the magnificence of the Heavenly Place, we will admire the other side and we will understand all His love.