Isaiah 64:1-5a - ”Rend the heavens and come down!”

Isaiah 64:1-5a, "Oh that You would rend the heavens and come down!"

It probably is not hard to identify with Isaiah's prayer/lament (at least at certain times in our life).  What is Isaiah wanting the LORD to do?  Another deliverance similar to the Israelites' exodus from slavery in Egypt?  I think, when the greater context of Isaiah's vision is taken into account, Isaiah is crying out for something much more!