On the weekly Torah Portion
Give ear, O heavens, and I will speak, and let the earth hear the words of my mouth (Deut. 32:1)
Why did Moses address the heavens and earth? Because G-d had already likened the Children of Israel to these things.
G-d said to Abraham: "Look up into the heavens and count the stars...so shall your seed be." G-d also promised, "And your seed shall be as the dust of the earth." (Sifri)
Of the Rock that bore you were you unmindful, and you forgot the G-d Who bore you (Deut. 32:10)
When G-d created man He gave him the gift of being "unmindful"--the ability to forget and allow time to heal the wounds which would befall him in this world. But, G-d claims, what did you do with this gift? You misused it, and forgot about Me! (Rabbi Menachem Mendel of Kotzk)
He was corrupted; the blemish is not to his children (Deut. 32:5)
No matter how corrupt and degraded a person may be, he always wants better for his children. He does not want them to continue in his sorry ways... (Rabbi Yonasan Eibeshutz)
And G-d saw and He was angry, because of the provoking of His sons and daughters (Deut. 32:19)
G-d's wrath is aroused when He sees the "provocation of His sons and daughters," that is, ill-feeling and controversy between one Jew and his fellow. Such behavior brings down G-d's anger upon His children. (Rabbi Moshe Pollak)