Matthew Henry on Psalms 75:6-10

No second causes will raise men to preferment without the First Cause. It comes neither from the east, nor from the west, nor from the south. He mentions not the north; the same word that signifies the north, signifies the secret place; and from the secret of God's counsel it does come. From God alone all must receive their doom. There are mixtures of mercy and grace in the cup of affliction, when it is put into the hands of God's people; mixtures of the curse, when it is put into the hands of the wicked. God's people have their share in common calamities, but the dregs of the cup are for the wicked. The exaltation of the Son of David will be the subject of the saints' everlasting praises. Then let sinners submit to the King of righteousness, and let believers rejoice in and obey him.