Va'era 5772

In the first aliyah of Va'era, Moshe tries to talk to Bnei Yisroel, but they don't listen to him because of "anguish of spirit and hard labor" (6:9). When Hashem tells Moshe to speak to Pharaoh, Moshe claims if Bnei Yisroel won't listen to him because he's not a good speaker, then surely Pharaoh won't! Didn't the previous posuk just mention that they didn't listen because of other factors? Rav Avraham Rivlin, the Mashgiach of Kerem B'Yavneh, explains that this is showing the true humility of Moshe. He puts the blame on himself rather than accusing the people.