http://revach.net/article.php?id=4876

Section: Parshas HaShavua   Category: Quick Vort
Parshas Shemos: Rav Moshe Feinstein - Why Did Moshe So Badly Not Want To Be The Redeemer?

For days on end Moshe Rabbeinu argued with Hashem, who asked him to go to Mitzrayim. Then Moshe tells Hashem to send Aharon (Shemos 4:13). Why would Moshe refuse the command of Hashem? Why does Moshe recommend others for the job, is Hashem not capable of finding the right man by Himself?

Rav Moshe Feinstein explains that until now Moshe was not a Navi. His older brother, Aharon, was a Navi and the great leader of Bnei Yisrael in Mitzrayim. Moshe expected Hashem to take Bnei Yisrael out of Mitzrayim in grand fashion. In his modesty, when Hashem told him that he would be the Goel, he was sure that Hashem chose him because he was of far lower stature, and Hashem didn't really want to take Bnei Yisrael out, but was only doing so to fulfill his promise to the Avos. Hashem was showing his displeasure by choosing Moshe.

Moshe's modesty was not about refusing Hashem, but rather about his desire to see a great geula filled with Hashem's love. Being chosen pained Moshe tremendously. He davened and fought with Hashem to march them out with a great leader like Aharon, his brother, and not through the back door with a lowly leader like himself.