With my soul ... in the night - By desiring God in the night, and by seeking him early, is meant that the desire to seek him was unremitted and constant. The prophet speaks of the pious Jews who were in captivity in Babylon; and says that it was the object of their unremitted anxiety to please God, and to do his will.
For when thy judgments are in the earth - This is given as a reason for what had just been said, that in their calamity they had sought God without ceasing. The reason is, that the punishments which he inflicted were intended to lead people to learn righteousness. The sentiment is expressed in a general form, though there is no doubt that the immediate reference is to the calamities which the Jews had suffered in their removal to Babylon as a punishment for their sins.
Learn righteousness - The design is to warn, to restrain, and to reform them. The immediate reference here was undoubtedly to the Jews, in whom this effect was seen in a remarkable manner in their captivity in Babylon. But it is also true of other nations; and though the effect of calamity is not always to turn a people to God, or to make them permanently righteous, yet it restrains them, and leads them at least to an external reformation, It is also true in regard to nations as well as individuals, that they make a more decided advance in virtue and piety in days of affliction than in the time of great external prosperity (compare Deuteronomy 6:11-12).