The Psalmist is generalising the historical fact of the sudden and utter destruction of Sennacherib's host into a universal law. And it _is_ a universal law--true for us as for Hezekiah and the sons of Korah, true for all generations. Martin Luther might well make this psalm the battle cry of the Reformation, and we may well make our own the rugged music and dauntless hope of his rendering of these words:-- And let the Prince of Ill Look grim as e'er he will, He harms us not a whit. For why? His doom is writ. A word shall quickly slay him.' IV. Then note, finally, how the psalm shows us the act by which we enter the City of God. 'The Lord of Hosts is with _us_; the God of Jacob is _our_ refuge.' It is not enough to lay down general truths, however true and however blessed, about the safe and sacred city of God--not enough to be theoretically convinced of the truth of the supreme governance and ever-present aid of God. We must take a further step that will lead us far beyond the regions of barren intellectual apprehension of the great truths of God's love and care. These truths are nothing to us, brethren! unless, like the Psalmist here, we make them our own, and losing the burden of self in the very act of grasping them by faith, unite ourselves with the great multitude who are joined together in Him, and say, 'He is _my_ God: He is _our_ refuge.' That living act of 'appropriating faith' presupposes, indeed, the presence of these truths in our understandings, but in the very act they are changed into powers in our lives. They pass into the affections and the will. They are no more empty generalities. Bread nourishes, not when it is looked at, but when it is eaten. 'He that eateth Me, even he shall live by Me.' We feed on Christ when we make Him ours by faith, and each of us is sustained and blessed by Him when we can say, 'My Lord and my God!' Mark, too, how there is here set forth the twofold ground for our calmest confidence in these two mighty names of God. 'The Lord of Hosts is with us.' That majestic name includes all the deepest and most blessed thoughts of God which the earlier revelation imparted. That name of 'Jehovah' proclaims at once His Eternal Being and His covenant relation--manifesting Him by its mysterious meaning as He who dwells above time, the tideless sea of absolute unchanging existence, from whom all the stream of creatural life flows forth many-coloured and transient, to whom it all returns, who, Himself unchanging, changeth all things, and declaring Him, by the historical associations connected with it, as having unveiled His purposes in firm words, to which men may trust, and as having entered into that solemn league with Israel which underlay their whole national life. He is _the Lord_ the Eternal,--the covenant name.