Observe how God's mercies are ushered in with a note of admiration, behold! Covenant mercies are indeed marvellous things. So think his people. Psalms 98:1. So think the world, Psalms 126:1-19.
Related Commentaries of Exodus 34:10
Exodus 34:10
10 And he said, Behold, I make a covenant: before all thy people I will do marvels, such as have not been done in all the earth, nor in any nation: and all the people among which thou art shall see the work of the LORD: for it is a terrible thing that I will do with thee.