The anger of the Lord was kindled against Moses. The expression used is a strong one, but does not perhaps here mean more than that God was displeased. At least, he did not punish the offender in any severer way than by the withholding of a gift that he was ready to bestow, and the partition between two of a position and a dignity which Moses might have had all to himself.
Perhaps diffidence and self-distrust, even when out of place, are not altogether abhorrent to One whose creatures are continually offending him by presumption and arrogance. Is not Aaron the Levite thy brother?
I know, etc. This translation is wrong. The two clauses form one sentence, and should be rendered, "Do I not know that Aaron the Levite, thy brother, speaks well?" Aaron's designation as "the Levite" is remarkable, and seems to glance at the future consecration of his tribe to God's especial service.
Behold, he cometh forth to meet thee. It has been conjectured that Aaron designed to visit Moses in Midian, in order to convey to him the intelligence that the king who had sought his life (Exodus 2:15) was dead.
He did not, however, start on the journey till God gave him a special direction (Exodus 4:27).