And he said, My presence shall go with thee We gather from this answer what the desire of Moses was, for God, in accepting his prayer, affirms in one word that He will go before them as He was wont, and this was a sure pledge of His presence in no ordinary manner. For although the whole world is governed by His providence, still His face does not therein appear so conspicuously as in His protection of the Church's welfare. And, in fact, since the same Angel, who had before presided over the camp, now undertakes the charge of guiding the people, the eternal divinity of Christ is clearly proved from hence. This clause, "My face [1] shall go before," is equivalent to his saying, I will so go before thee, that thou shalt truly perceive that I am with thee, as if thou shouldst see my face set before thine eyes in a mirror. Now, since this was fulfilled in Christ, it follows that He is the eternal God, whose glory, power, and majesty is far above all creatures. The rest which He promises has reference to the perseverance of His grace, and its final accomplishment, as if it were said, when the people shall have entered the land, they shall be under God's protection and guardianship; for what was common to the whole people is ascribed to the person of Moses.

Footnotes

1 - "My presence shall go with thee." -- A.V.

Rest - This was the common expression for the possession of the promised land. Deuteronomy 3:20; Joshua 1:13, Joshua 1:15; compare Hebrews 4:8.

My presence shall go with thee - פני ילכו panai yelechu, my faces shall go. I shall give thee manifestations of my grace and goodness through the whole of thy journey. I shall vary my appearances for thee, as thy necessities shall require.

And he said, My (f) presence shall go [with thee], and I will give thee rest.
(f) Signifying that the Israelites would exceed all other people, through God's favour; (Exodus 33:16).

And he said,.... In answer to his request:
my presence shall go with thee; or before thee, both with Moses and before the people; meaning the Angel of his presence he had before promised, the eternal Word and Son of God, who saved them, redeemed them, bore and carried them all the days of old: or "my faces shall go" (y); all the three divine Persons, Father, Son, and Spirit; there was Jehovah the Father, whose the Angel of his presence was; and there was Jehovah the Son, Christ, whom they tempted in the wilderness; and there was Jehovah the Holy Spirit, whom they vexed, see Isaiah 63:9.
and I will give thee rest; not ease, and peace and tranquillity of mind, or a freedom from the fear of enemies, and all dangers by them, much less rest in the grave, before Israel should be brought into Canaan's land; but rather the promised land itself, which was "the rest" that was promised, and would be given, and was typical of that eternal rest which remains for the people of God in heaven, and is a pure gift; for this promise is not personal and peculiar to Moses, but belonged to all the people, to whom God would give the typical rest, see Deuteronomy 12:9.
(y) "facies meae ibunt", Montanus, Vatablus.