Against the heavens, i.e. against God, blaspheming his name, denying or deriding his providence, reviling his saints and servants. Walketh through the earth; using all manner of liberty, introducing and reproaching all sorts of persons, not caring whom they displease or hurt by it.
Related Commentaries of Psalms 73:9
Psalms 73:9
9 They set their mouth against the heavens, and their tongue walketh through the earth.