When Moshe asked Hashem how he could go since he had a speech impediment, Hashem responded by saying, “See that I have appointed you as a lord over Pharaoh [to administer the plagues.]” (7:1)
Rather than respond to Moshe’s concern directly, Hashem tells him to focus on something else.
Don’t look at the negative that you cannot speak well; look at the positive that I (G-d) have commanded you to do this, and deputized you.
Chovos HaLevavos recounts a story of a Master walking with his students who passed the dead body of a dog. The students said, “How foul-smelling this carcass is.” The Master replied, “Look how white his teeth are.”
The students felt ashamed for seeing the negative. For his part, the Master had trained himself to find the good in everything to the point where he even saw the good in the whiteness of the decaying dog’s teeth.
A similar story occurred with R’ Chatzkel Abramsky, who was asked by another Rabbi in London, “I can learn as well as you can, and I speak English as poorly as you do. Why do more people flock to your lectures?”
R’ Chatzkel replied, “Because you focus on how poorly you speak, while I focus on how well I learn.”
