Psalms 89:52 - Albert Barnes' Notes on the Bible

Blessed be the Lord for evermore - Praise to God always. So Chrysostom was accustomed to say, even when driven out as an exile and a wanderer, “Blessed be God for everything.” The passage here denotes entire acquiescence in God; perfect confidence in him; a belief that he was right, and faithful, and true. It is an instance of the faith which those who are truly pious have in God, in all circumstances, and at all times; of their belief that he is worthy of entire confidence, and ought always to be praised. Compare Job 1:21. At the close of all kinds of trouble - and in the midst of all kinds of trouble - true piety will enable us to say, “Blessed be God.”