Isaiah 50:11

(11) All ye that kindle a fire.—The words obviously point to any human substitute for the Divine light, and thus include the two meanings which commentators have given them: (1) Man’s fiery wrath, that worketh not the righteousness of God; and (2) man’s attempt to rest in earthly comforts or enjoyments instead of in the light and joy that comes from God.

That compass yourselves about with sparks.—The words are rendered by many commentators, gird yourselves with burning darts, or firebrands, i.e., with calumnies and execrations as your weapons of warfare (Comp. Ephesians 6:16.)

Ye shall lie down in sorrow.—The words point to a death of anguish, perhaps to the torment that follows death (comp. Luke 16:24), as the outcome of the substitution of the earthly for the heavenly light.