Isaiah 64:3

3 There was a time when you came and did terrifying things that we did not expect; the mountains saw you and shook with fear.

Isaiah 64:3 Meaning and Commentary

Isaiah 64:3

When thou didst terrible things, which we looked not for, thou
camest down
Referring to the wonderful things God did in Egypt, at the Red sea, and in the wilderness, and particularly at Mount Sinai, things that were unexpected, and not looked for; then the Lord came down, and made visible displays of his power and presence, especially on Mount Sinai; see ( Exodus 19:18 ) : the mountains flowed down at thy presence;
not Sinai only, but others also; Kimchi says Seir and Paran; ( Judges 5:4 Judges 5:5 ) ( Psalms 68:7 Psalms 68:8 ) ( Habakkuk 3:3 Habakkuk 3:6 ) .

Isaiah 64:3 In-Context

1 Why don't you tear the sky open and come down? The mountains would see you and shake with fear.

2 They would tremble like water boiling over a hot fire. Come and reveal your power to your enemies, and make the nations tremble at your presence!

3 There was a time when you came and did terrifying things that we did not expect; the mountains saw you and shook with fear.

4 No one has ever seen or heard of a God like you, who does such deeds for those who put their hope in him.

5 You welcome those who find joy in doing what is right, those who remember how you want them to live. You were angry with us, but we went on sinning; in spite of your great anger we have continued to do wrong since ancient times.