1)
What do we learn from "Tamim Atah"?
1.
Malbim: At the beginning you were pure and proper for all this honor, until sin was found in you, and you are no longer worthy of it.
2)
When was "mi'Yom Hibar'ach"?
1.
Radak: From the day that you understood [what you should do]. Also "Rachavta Alai me'Odecha" (Bamidbar 22:30) is from when you rode.
3)
What sin was found in you?
1.
Rashi: You said 'I am Kel' (2).
2.
Radak: You were haughty over Am Hashem, and rejoiced over its ruin.
3.
Malbim: Refer to 28:16:1:1.
