Parshat ראה mentions an amazing ceremony that took place shortly after the Jewish people entered Eretz Yisrael. It was another establishment of the covenant between G-d and the Jewish nation. This was in addition to the covenant at Mount Sinai and the covenant that Moshe made before his death. The ceremony took place in the valley between Mount Gerizim and Mount Eival in the northern Shomron. Half of the tribes stood on one mountain and the other half on the other mountain. At the bottom in the valley, were the Levites as well as the Kohanim and the Holy ark. When they recited the blessing, they faced Mount Gerizim and for the curse they faced Mount Eival. There were a total of twelve blessings and curses. After each one, the entire nation answered אמן. What is interesting about these twelve cases mentioned, they all involved acting in a deceitful manner where they could cover up their actions. One needed to act in public as he did in private. It seems that Hashem does not tolerate hypocrisy and expects people to act with love and openness rather than deception and manipulation. That was what the ceremony at הר גריזים and הר עיבל was meant to impress.