After encountering bitter disappointment from his own people, Moses turns to God in a state of deep frustration and pain. He is not refusing his mission or arguing with his Creator. Instead, he is pouring out his sorrow and unburdening his heart, expressing the heavy weight of his perceived failure while God listens [אור החיים, העמק דבר, רש"ר הירש]. Although Moses had already overcome his initial doubts at the burning bush, the closed hearts of the people plunge him into a new and even more severe crisis [קאסוטו].
In his distress, Moses presents a logical argument to God, recognized as one of ten classic minor to major deductions found in the Torah. He reasons that if the Israelites, who are the direct beneficiaries of the message of redemption, refused to listen, it is certain that Pharaoh will refuse to listen, since the message demands that he surrender his power and suffer a loss [רש"י, מזרחי]. However, this logic presents a notable difficulty. Earlier, it was established that the Israelites failed to listen because their spirits were crushed by harsh labor. Since Pharaoh is not burdened by any physical labor, how can Moses compare the two situations?
Commentators offer two distinct approaches to resolve this question. One perspective suggests that Moses was actually unaware that the harsh labor was the true reason for the people's unresponsiveness. He mistakenly assumed they rejected his message because of his heavy speech and his inability to articulate his words clearly. Consequently, he feared Pharaoh would reject him for that exact same reason [שפתי חכמים, ריב"א, חזקוני, מלבי"ם]. A contrasting view maintains that Moses was fully aware of the people's crushing labor, but he weighed their situation against Pharaoh's character. In Moses's eyes, the Israelites were people of faith receiving a joyous message of redemption, something that should have brought them comfort despite their suffering. Pharaoh, on the other hand, is an arrogant king who denies God, and the message he receives is a severe blow to his authority. If the Israelites failed to listen despite their virtues and the good news, Moses reasoned that a defiant king receiving bad news would certainly ignore him [אור החיים, גור אריה, ביאור יש"ר, דעת זקנים, אלשיך].
Alongside this logical deduction, Moses expresses a deeply personal insecurity, feeling that his lips are blocked, sealed, or covered [רש"י, שד"ל, ביאור יש"ר]. He feels physically incapable of producing the fluent, persuasive speech required for his task. This raises a question about why Moses brings up his speech impediment again, considering God had already appointed Aaron to be his spokesman. The commentators explain that during the initial mission, the command was specifically for Aaron to speak to the people. Moses assumed Aaron was meant to serve as his interpreter only for the Israelites. Now, however, God commands Moses to go and speak directly to Pharaoh. In his deep humility, Moses feels it would be shameful and undignified to stand before a powerful monarch and stutter, unable to sway the king's heart with eloquent reasoning [רמב"ן, ספורנו, אבן עזרא, הטור הארוך, העמק דבר]. Ultimately, Moses is terrified that if his own people could not understand his heavy speech, Pharaoh certainly will not [לבוש האורה].