Psalms 73:9 - Exposition

They set their mouth against the heavens. So Hupfeld and Canon Cook, who understand the expression of blasphemy; but most modern critics translate, "They have set their mouth in the heavens," and regard the meaning as nearly allied to that of the second clause of the preceding verse, "They speak as though they were inhabitants of the heavens." And their tongue walketh through the earth. Their tongue is always busily employed—boasting ( Psalms 73:3 ), lying, backbiting.