3:1-6 The years of the life of Moses are divided into three forties; the first forty he spent as a prince in Pharaoh's court, the second as a shepherd in Midian, the third as a king in Jeshurun. How changeable is the life of man! The first appearance of God to Moses, found him tending sheep. This seems a poor employment for a man of his parts and education, yet he rests satisfied with it; and thus learns meekness and contentment, for which he is more noted in sacred writ, than for all his learning. Satan loves to find us idle; God is pleased when he finds us employed. Being alone, is a good friend to our communion with God. To his great surprise, Moses saw a bush burning without fire to kindle it. The bush burned, and yet did not burn away; an emblem of the church in bondage in Egypt. And it fitly reminds us of the church in every age, under its severest persecutions kept by the presence of God from being destroyed. Fire is an emblem, in Scripture, of the Divine holiness and justice, also of the afflictions and trials with which God proves and purifies his people, and even of that baptism of the Holy Ghost, by which sinful affections are consumed, and the soul changed into the Divine nature and image. God gave Moses a gracious call, to which he returned a ready answer. Those that would have communion with God, must attend upon him in the ordinances wherein he is pleased to manifest himself and his glory, though it be in a bush. Putting off the shoe was a token of respect and submission. We ought to draw nigh to God with a solemn pause and preparation, carefully avoiding every thing that looks light and rude, and unbecoming his service. God does not say, I was the God of Abraham, Isaac, and Jacob, but I am. The patriarchs still live, so many years after their bodies have been in the grave. No length of time can separate the souls of the just from their Maker. By this, God instructed Moses as to another world, and strengthened his belief of a future state. Thus it is interpreted by our Lord Jesus, who, from hence, proves that the dead are raised, Lu 20:37. Moses hid his face, as if both ashamed and afraid to look upon God. The more we see of God, and his grace, and covenant love, the more cause we shall see to worship him with reverence and godly fear.

2, 3. the angel of the Lord appeared unto him in a flame of fire—It is common in Scripture to represent the elements and operations of nature, as winds, fires, earthquakes, pestilence, everything enlisted in executing the divine will, as the "angels" or messengers of God. But in such cases God Himself is considered as really, though invisibly, present. Here the preternatural fire may be primarily meant by the expression "angel of the Lord"; but it is clear that under this symbol, the Divine Being was present, whose name is given (Ex 3:4, 6), and elsewhere called the angel of the covenant, Jehovah-Jesus.

out of the midst of a bush—the wild acacia or thorn, with which that desert abounds, and which is generally dry and brittle, so much so, that at certain seasons, a spark might kindle a district far and wide into a blaze. A fire, therefore, being in the midst of such a desert bush was a "great sight." It is generally supposed to have been emblematic of the Israelites' condition in Egypt—oppressed by a grinding servitude and a bloody persecution, and yet, in spite of the cruel policy that was bent on annihilating them, they continued as numerous and thriving as ever. The reason was "God was in the midst of them." The symbol may also represent the present state of the Jews, as well as of the Church generally in the world.