And they remembered that God was their Rock - See Deuteronomy 32:4, Deuteronomy 32:15, Deuteronomy 32:31. Compare the notes at Psalms 18:2. That is, they were brought to reflect that their only security and defense was God. They were made to feel that they could not rely on themselves, or on any human power, and that their only trust was in God.
And the high God their Redeemer - The God who is exalted over all; the true and living God. The truth was brought to their recollection that it was He who had delivered them from bondage in Egypt, and who had brought them out into freedom. On the word “Redeemer,” see the notes at Isaiah 41:14. Compare Isaiah 43:14; Isaiah 44:6, Isaiah 44:24; Isaiah 47:4; Isaiah 59:20; Psalms 25:22; Job 5:20.