EXPOSITION
The scene suddenly shifts. Moses is left in the wilderness to recover his strength and make such arrangements with respect to his wife and children as he thinks best under the circumstances. We are carried away to Egypt and introduced to Aaron, Moses' elder brother, of whom we have only heard previously that he could "speak well," and was to assist Moses as spokesman in his enterprise (Exodus 4:14-2). We now find God revealing himself to Aaron also, and directing his movements, as he had those of Moses. Aaron had perhaps already formed the design of visiting his brother (see Exodus 4:14), and would have sought him in Midian but for the direction now given him. That direction was probably more definite than is expressed in the text, and enabled him to set forth confidently, without the fear of missing his brother. At any rate, under God's guidance he went and met him in the Sinaitic district. The joy of meeting is briefly described in the single phrase "he kissed him." The meeting was followed by a full explanation, on the part of Moses, both of the nature of his own mission and of the part which Aaron was to take in it.
Go into the wilderness. It is scarcely possible that this can have been the whole of the direction given, since the wilderness extended from the shores of the Mediterranean to the extreme point of the Sinaitic peninsula. The sacred writers study brevity, and leave much to be supplied by the common-sense of the reader. He went and met him in the mount of God. Compare above, Exodus 3:1, which shows that Horeb is meant. Horeb seems to have been the name for the entire mountain region, of which Sinai was a part. Kissed him. So Esau kissed Jacob after their long separation (Genesis 33:4), and Joseph, Benjamin and his other brethren (Genesis 45:14, Genesis 45:15). In the East men are more demonstrative than with us. Aaron's kiss showed the gladness that was in his heart (supra, Exodus 3:14).
Moses told Aaron all the words of the Lord. Perfect confidence between the two brothers was absolutely necessary for the success of their enterprise; and Moses wisely, at their very first interview, made Aaron acquainted with the entire series of Divine revelations that had been made to him, keeping nothing back, but communicating to him "all the words of the Lord." Who had sent him. Rather, "which he had laid upon him." (So the LXX; the Vulgate, Knobel, Kalisch, and others.) All the signs. Compare Exodus 4:3-2 and Exodus 4:23.
HOMILETICS
God does not stint his help when he visits man.
It might have seemed that God had now done enough to set on foot the deliverance of his people. He had appeared to Moses, overcome his reluctance to be leader, given him the power of working some great miracles, and allowed him to devolve a portion of his duties upon his brother; Moses was on his way to Egypt to carry out his commission, and Aaron was minded to go forth to meet and greet him. Humanly speaking, nothing more was needed for the initiation of the work. But God, who "seeth not as man seeth," does not stint his arm when he has taken a business in hand. It would expedite matters if Aaron were to be directed where to meet Moses, and the two brothers were to have their conference at once, and arrange their course of proceedings. So Aaron is visited, probably by an angel, and sent to meet Moses, and told where he will find him; and by these means the meeting is brought about with all speed, Aaron enlightened as to his duties, and plans arranged to be put in act as soon as Egypt is reached. The two brothers gain the advantage of sweet companionship some days or weeks earlier than they would have done if left to themselves, and their first interview with Pharaoh is advanced correspondingly. And as with his miraculous, so with his ordinary help. God does not stint it. His grace is ever sufficient for men. He gives them all that they can possibly need, and more than they would ever think of asking. He loves to pour out his blessings abundantly on those that are true to him; makes "all things work together for their good;" goes out of his way to procure advantages for them; loads them with his favours.
Full confidence necessary between fellow-workers.
Moses told Aaron "all the words of the Lord"—made "a clean breast" to him, kept back none of the counsel of God, so far as he had been made acquainted with it. A kind, a loving, and a prudent course. Half-confidences are valueless; they irritate rather than satisfy. If known to be half-confidences, they offend; if mistaken for full ones, they mislead and conduct to disaster. Those who are to be fellow-workers in any undertaking—more especially any great one—should have entire confidence each in each, and be wholly unreserved one towards the other. There is good sense and good advice in the motto, "Trust me not at all or all in all."