Isaiah 64:1-4 (HCSB)

If only You would tear the heavens open
and come down,
so that mountains would quake at Your presence —
 as fire kindles the brushwood,
and fire causes water to boil —
to make Your name known to Your enemies,
so that nations will tremble at Your presence!
 When You did awesome works
that we did not expect,
You came down,
and the mountains quaked at Your presence.
 From ancient times no one has heard,
no one has listened,
no eye has seen any God except You,
who acts on behalf of the one who waits for Him.

     Isaiah is no less concerned with God just breaking into history and demonstrating his power (colloquially we could say “kicking butts”) than are we today.  We want God to enter history in power so that his enemies would scatter and run.  Isaiah wanted this also.
     God acts, says Isaiah, on behalf of those who wait for Him.  So we wait, impatiently perhaps, imperfectly, restlesss, but he knows our natures and our weaknesses.  He will make his name known, in his time.
Calvin:  God is said to “rend the heavens,” when he unexpectedly gives some uncommon and striking proof of his power; and the reason of this mode of expression is, not only that men, when they are hard pressed, commonly look up to heaven, from which they expect assistance, but that miracles, by interrupting the order of nature, open up for themselves an unusual path. Now, when God renders no assistance, he appears to be shut up in heaven, and to disregard what is taking place on earth. For this reason he is said to open and “rend the heavens,” when he holds out to us some testimony of his presence; because otherwise we think that he is at a great distance from us.