Every person has, at some time, had to deal with anger, irritation, and frustration. Like Moses the anger of our flesh can became stronger than our desire for the integrity of Yahveh’s (the Lord’s) fame, honor, and glory.
In anger, Moses blocked the Israelites from seeing the character of the Almighty, who is all-loving, all-merciful, all-forgiving. We, too, can block the glory, yet we are to be instruments through which the glory is manifested.