And it shall come to pass, while my glory passeth by, that I will put thee in a cleft of the rock, and will cover thee with my hand while I pass by:

Wesley's Notes

33:22 I will put thee in a cleft of the rock - In that he was to be sheltered from the dazzling light, and devouring fire of God's glory. This was the rock in Horeb, out of which water was brought, of which it is said, That rock was Christ, 1Cor 10:4. 'Tis in the clefts of this rock that we are secured from the wrath of God, which otherwise would consume us: God himself will protect those that are thus hid: and it is only through Christ that we have the knowledge of the glory of God. None can see that to their comfort, but those that stand upon this rock, and take shelter in it.

Matthew Henry's Concise Commentary

33:12-23 Moses is very earnest with God. Thus, by the intercession of Christ, we are not only saved from ruin, but become entitled to everlasting happiness. Observe here how he pleads. We find grace in God's sight, if we find grace in our hearts to guide and quicken us in the way of our duty. Moses speaks as one who dreaded the thought of going forward without the Lord's presence. God's gracious promises, and mercy towards us, should not only encourage our faith, but also excite our fervency in prayer. Observe how he speeds. See, in a type, Christ's intercession, which he ever lives to make for all that come to God by him; and that it is not by any thing in those for whom he intercedes. Moses then entreats a sight of God's glory, and is heard in that also. A full discovery of the glory of God, would overwhelm even Moses himself. Man is mean, and unworthy of it; weak, and could not bear it; guilty, and could not but dread it. The merciful display which is made in Christ Jesus, alone can be borne by us. The Lord granted that which would abundantly satisfy. God's goodness is his glory; and he will have us to know him by the glory of his mercy, more than by the glory of his majesty. Upon the rock there was a fit place for Moses to view the goodness and glory of God. The rock in Horeb was typical of Christ the Rock; the Rock of refuge, salvation, and strength. Happy are they who stand upon this Rock. The cleft may be an emblem of Christ, as smitten, crucified, wounded, and slain. What follows, denotes the imperfect knowledge of God in the present state, even as revealed in Christ; for this, when compared with the heavenly sight of him. is but like seeing a man that is gone by, whose back only is to be seen. God in Christ, as he is, even the fullest and brightest displays of his glory, grace, and goodness, are reserved to another state.