The catalogue of sins is left incomplete (compare with chapter ii.), as if holy indignation turned for relief to the thought of the certain judgment. That certainly is strongly affirmed by the representation of the oath of Jehovah. 'He can swear by no other,' therefore He 'swears by Himself'; and the 'excellency of Jacob' cannot with propriety mean anything else than Him who is, or ought to be, the sole ground of confidence and occasion of 'boasting' to the nation (Hos. v. 5). He gives His own being as the guarantee that judgment shall fall. As surely as God is God, injustice and avarice will ruin a nation. We talk now about necessary consequences and natural laws rendering penalties inevitable. The Bible suggests a deeper foundation for their certain incidence--even the very nature of God Himself. As long as He is what He is, covetousness and its child, harshness to the needy, will be sin against Him, and be avenged sooner or later. God has a long and a wide memory, and the sins which He 'remembers' are those which He has not forgiven, and will punish. Amos heaps image on image to deepen the impression of terror and confusion. Everything is turned to its opposite. The solid land reels, rises, and falls, like the Nile in flood (see Revised Version). The sun sets at midday, and noon is darkness. Feasts change to mourning, songs to lamentations. Rich garments are put aside for sackcloth, and flowing locks drop off and leave bald heads. These are evidently all figures vividly piled together to express the same thought. The crash that destroyed their national prosperity and existence would shake the most solid things and darken the brightest. It would come suddenly, as if the sun plunged from the zenith to the west. It would make joy a stranger, and bring grief as bitter as when a father or a mother mourns the death of an only son. Besides all this, something darker beyond is dimly hinted in that awful, vague, final threat, 'The end thereof as a bitter day.' Now all these threats were fulfilled in the fall of the kingdom of Israel; but that 'day of the Lord' was in principle a miniature foreshadowing of the great final judgment. Some of the very features of the description here are repeated with reference to it in the New Testament. We cannot treat such prophecies as this as if they were exhausted by their historical fulfilment. They disclose the eternal course of divine judgment, which is to culminate in a future day of judgment. The oath of God is not yet completely fulfilled. Assuredly as He lives and is God, so surely will modern sinners have to stand their trial; and, as of old, the chase after riches will bring down crashing ruin. We need that vision of judgment as much as Samaria did when Amos saw the basket of ripe fruit, craving, as it were, to be plucked. So do obstinate sinners invite destruction.