God with us assures confidence and victory.
What "casting off" is here referred to by the psalmist no one seems to have satisfactorily explained. The best suggestion, perhaps, is that the sentiments of a returned exile are here interwoven with the sentiments of David. The idea of God, as one who had cast off his people for awhile, is quite suitable to a returned exile, but quite unsuitable to David. The thought is, however, found in the original of this psalm (Psalms 60:1); and if we must connect it with David, it is necessary to assume that he suffered some temporary repulse in the beginning of his national wars, and that, in a gloomy, poetic way, he regarded this as "God casting off his people." A good writer on Psalms 9:1-20. says, "From the first five verses we should gather that the country had been crushed by some great national disaster." One is forcibly reminded of two scenes in the national history.
I. THE ANXIETY OF MOSES ABOUT GOD GOING WITH ISRAEL. Recall the expressions of Divine indignation in the matter of the golden calf. The purpose was, as it were half formed, to cast off a people who were showing themselves so unfaithful to the trust reposed in them. Moses interceded. The evident burden on his heart was the possibility that God might not himself go with them; and he passionately pleaded, "If thy presence go not with me, carry us not up hence." Well he knew that "God with us assures confidence and victory."
II. THE ANXIETY OF JOSHUA ABOUT GOD GOING WITH ISRAEL. When the covenant was broken, through the covetousness of Achan, God for a time withdrew his defense and help, cast off his people, with the result that the army was defeated, and the whole expedition placed in jeopardy. Joshua was terribly distressed. It seemed to him (not knowing the real cause of the disaster) that the very Name of God was being dishonored, and he passionately pleaded for that restoration of God's presence and power which alone could give confidence and victory. The history of God's people furnishes abundant illustrations of the same truth; and it was sealed for ever, as the truth of truths for helpless man, when the ascending Jesus gave his assurance, "Lo, I am with you all the days."—R.T.