Verses 1-7
Psalms 66-67 God and the nations
It appears that in Psalm 66 the people join in singing the first part of the song, and that the king sings the latter part alone. The song opens with a call to people worldwide to sing praise to God for a notable victory he has just won for Israel (66:1-4). Centuries earlier God brought Israel out of Egypt and led the people through the Red Sea, and the same God still rules in the affairs of nations (5-9). The worshippers acknowledge that in allowing them temporarily to be defeated, God had been working for their good. His purpose was to correct their waywardness so that once again they might enjoy the freedom of life that is found only in his presence (10-12).
The king then sings his praises, promising to present sacrifices in fulfilment of the vows he made to God during the time of trouble (13-15). He urges godly people everywhere to take note of what the experience has taught him (16). Above all, it has taught him not to ignore personal wrongdoing. God answers the prayers of those who have no known sin unconfessed in their lives (17-20).
Psalm 67 shows God's loving purposes towards all the nations of the world. When the people of Israel enter into the fulness of God's blessing, they will be in a fit condition to take the message of his salvation to other nations (67:1-3). These nations will then have their way of life changed through coming under the just rule and merciful guidance of God (4-5). People everywhere will rejoice in God's good gifts and offer thanks to him (6-7).