3 For when you did awesome things that we did not expect, you came down, and the mountains trembled before you.
3 When thou didst terrible things which we looked not for, thou camest down, the mountains flowed down at thy presence.
3 When you did awesome things that we did not look for, you came down, the mountains quaked at your presence.
3 To shock your enemies into facing you, make the nations shake in their boots! You did terrible things we never expected, descended and made the mountains shudder at your presence.
3 When You did awesome things for which we did not look, You came down, The mountains shook at Your presence.
3 When you came down long ago, you did awesome deeds beyond our highest expectations. And oh, how the mountains quaked!
Matthew Henry's Commentary on Isaiah 64:3
Commentary on Isaiah 64:1-5
(Read Isaiah 64:1-5)
They desire that God would manifest himself to them and for them, so that all may see it. This is applicable to the second coming of Christ, when the Lord himself shall descend from heaven. They plead what God had used to do, and had declared his gracious purpose to do, for his people. They need not fear being disappointed of it, for it is sure; or disappointed in it, for it is sufficient. The happiness of his people is bound up in what God has designed for them, and is preparing for them, and preparing them for; what he has done or will do. Can we believe this, and then think any thing too great to expect from his truth, power, and love? It is spiritual and cannot be comprehended by human understanding. It is ever ready. See what communion there is between a gracious God and a gracious soul. We must make conscience of doing our duty in every thing the Lord our God requires. Thou meetest him; this speaks his freeness and forwardness in doing them good. Though God has been angry with us for our sins, and justly, yet his anger has soon ended; but in his favour is life, which goes on and continues, and on that we depend for our salvation.