Ha'azinu: Chapter 1
"Give ear, O heavens"

Rabbi Yehuda speaks of the many times that Moses reproved Yisrael, but tells us that Moses said all these things with love, always reminding the people how much God loved them. Rabbi Yitzchak says that Moses had always refused to be guided by anyone other than God Himself; he would not be guided by any angel or messenger. Moses never trembled before the voice of God or any messenger, and yet after he died Joshua was afraid of God's messengers. God was no longer as available to Yisrael as He had been during Moses' lifetime.