Exodus 33:15

If thy presence go not - אם אין פניך הלכים im ein paneycha holechim, if thy faces do not go - if we have not manifestations of thy peculiar providence and grace, carry us not up hence. Without supernatural assistance, and a most particular providence, he knew that it would be impossible either to govern such a people, or support them in the desert; and therefore he wishes to be well assured on this head, that he may lead them up with confidence, and be able to give them the most explicit assurances of support and protection. But by what means should these manifestations take place? This question seems to be answered by the Prophet Isaiah, Isaiah 63:9 : In all their affliction he was afflicted, and the Angel of his presence (פניו panaiv, of his faces) saved them. So we find that the goodness and mercy of God were to be manifested by the Angel of the Covenant, the Lord Jesus, the Messiah; and this is the interpretation which the Jews themselves give of this place. Can any person lead men to the typical Canaan, who is not himself influenced and directed by the Lord? And of what use are all the means of grace, if not crowned with the presence and blessing of the God of Israel? It is on this ground that Jesus Christ hath said, Where two or three are gathered together in my name, I am in the midst of them, Matthew 18:20; without which, what would preachings, prayers, and even Sacraments avail?

33:15 And he said, If thy presence go not with me, carry us not up hence - He speaks as one that dreaded the thought of going forward without God's presence.