Who are "Nimharei Lev"?
Rashi: They rush the redemption, and are pained over its delay.
Radak: Those who are confounded in their hearts amidst great afflictions of Galus.
Malbim: They press the time (are anxious for the salvation to come immediately).
Why does it say "Elokeichem] Nakam Yavo"?
Rashi: This is like b'Nakam Yavo.
Radak: He will come La'asos Nakam (to avenge).
Malbim: He will come in the way of vengeance against the Nochrim. Therefore, he must wait until their measure (of liability) is full.
What is "Gemul Elokim"?
Rashi: It is payment (punishment) of Resha'im; it will come and save you.
Radak: He will save you from Galus. Malbim - this will be the reward for your deeds. Therefore it delays until you will be worthy.
