1)
How did he know that Hashem sent an angel?
1.
Ibn Ezra: This is the fourth one that he saw in the furnace.
2.
Malbim: It was not via natural forces, e.g. sending cold to cool the fire.
2)
What is the meaning of "Hisrechitzu"?
1.
Rashi: They trusted.
2.
Malbim: This was a full trust ? even though they were not sure that they will be saved ? "vi'Yhavu Geshmehon", and they said "v'Hen Lo Yedi'a Lehevei Lach?"
3)
What is the meaning of "Shaniv"?
1.
Rashi: They deviated, and did not fulfill [the king's word].
4)
Why did he add "v'Lo Yisgedun"?
1.
Malbim: Even though he merely requested that they bow to the king's statue, and not idolatry, they refused.
