Charles H. Spurgeon on Psalms 137:1

Let us weep, because in this life we are forced to sit by the waters of Babylon, and are yet strangers and as it were banished and barred from being satisfied with the pleasures of that river which gladdens the city of God. Alas, if we did consider that our country were heaven, and did apprehend this place here below to be our prison, or place of banishment, the least absence from our country would draw tears from our eyes and sighs from our hearts, with David (Ps 120:5): "Woe is me that I sojourn in Mesech, and am constrained to dwell in the tents of Kedar." Do you remember how the Jews behaved themselves in the time of their exile and captivity, while they sat by the rivers and waters of Babylon! They wept, would not be comforted; hanged up their harps and instruments. What are the waters of Babylon but the pleasures and delights of the world, the waters of confusion, as the word signifies! Now when the people of God sit by them, that is to say, do not carelessly, but deliberately, with a settled consideration, see them slide by and pass away, and compare them with Sion, that is to say, with the inconceivable rivers of pleasure, which are permanent in the heavenly Jerusalem; how can they choose but weep, when they see themselves sitting by the one, and sojourning from the other! And it is worthy your observing, that notwithstanding the Jews had many causes of tears, the Chaldeans had robbed them of their goods, honours, countries, liberty, parents, children, friends: the chief thing, for all this, that they mourn for is their absence from Sion, —"We wept when we remembered thee, O Sion" —for their absence from Jerusalem. What should we then do for our absence from another manner of Jerusalem! Theirs was an earthly, old, robbed, spoiled, burned, sacked Jerusalem; ours a heavenly, new one, into which no arrow can be shot, no noise of the drum heard, nor sound of the trumpet, nor calling unto battle: who would not then weep, to be absent from thence! —Walter Balcanqual, in "A Sermon Preached at St. Maries Spittle," 1623.