Isaiah 64:3

3 In Thy doing fearful things -- we expect not, Thou didst come down, From Thy presence did mountains flow.

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 Didst Thou not rend the heavens? Thou didst come down, From thy presence did mountains flow,

2 (As fire kindleth stubble -- Fire causeth water to boil,) To make known Thy name to Thine adversaries, From Thy presence do nations tremble.

3 In Thy doing fearful things -- we expect not, Thou didst come down, From Thy presence did mountains flow.

4 Even from antiquity [men] have not heard, They have not given ear, Eye hath not seen a God save Thee, He doth work for those waiting for Him.

5 Thou hast met with the rejoicer And the doer of righteousness, In Thy ways they remember Thee, Lo, Thou hast been wroth when we sin, By them [is] continuance, and we are saved.