Most of the portion of Ha’azinu is a song, written in the Torah in two parallel columns. Moshe summons heaven and earth to stand as eternal witness to what will happen if the Jewish People sin. He reminds the people to examine world history and note how the Jewish People are rescued from obliteration in each generation — that Hashem “pulls the strings” of world events so that the Bnei Yisrael can fulfill their destiny as Hashem’s messengers. Hashem’s kindness is such that Israel should be eternally grateful, not just for sustaining them in the wilderness, but for bringing them to a land of amazing abundance, and for defeating their enemies. But, this physical bounty leads the people to become self-satisfied and over-indulged. Physical pleasures corrupt their morals. They worship empty idols and indulge in depravity. Hashem will then let nations with no moral worth subjugate Israel and scatter them across the world. However, the purpose of these nations is to act as a rod to chastise the Jewish People. When these nations think that it is through their own power that they have dominated Israel, Hashem will remind them that they are no more than a tool to do His will. The purpose of the Jewish People is to make mankind aware of the Creator. Neither exile nor suffering can sever the bond between Hashem and His people, and in the final redemption this closeness will be restored. Hashem will then turn His anger against the enemies of Israel. Hashem then gives His last commandment to Moshe: That he ascend Mount Nevo and be gathered there to his People.