For wherein shall it be known here
 At Sinai, among the mountains in the wilderness: 
 that I and thy people have found grace in thy sight:
 were acceptable to him, highly esteemed by him, and had received peculiar favours from him; what evidence would there be of this? how would it appear to others? what knowledge could they have of it? 
 [is it] not in that thou goest with us?
 in such a grand majestic manner, and so visible as in a pillar of cloud by day, and a pillar of fire by night: this is a full proof, and a strong and convincing argument, even to a demonstration, that they were a special and peculiar people, the favourites of God, highly esteemed and honoured by him; but should this be discontinued, as seemed to be threatened, there would be nothing to demonstrate that they had found more grace and favour than other people; but this being the case, 
 so shall we be separated, I and thy people, from all the people
 [that are] upon the face of the earth;
 distinguished by this favour from them, and that in a very wonderful and marvellous manner, as the word signifies; and so some render it, "marvellously separated" F1; for the pillar of cloud and fire was a very marvellous thing, and distinguished the people of Israel from all others in a surprising manner, none having been ever favoured in the like manner.