Psalm 69

Saying “waters” in the plural indicates the plurality of Christ’s sufferings and of our sins. In the same way the mire of the deep (v. 2) is His punishment for our lust of the flesh, as the waters are the lust of the eyes. For iniquity is properly greed, and hence it is called “the mammon of unrighteousness” (Luke 16:9). And our flesh is truly mire made of mire, remaining as mire, and will be mire again in the future. But iniquity is the waters of riches, for just as the waters flow and do not stay, so it is similarly with riches. But the dirt is on earth even after this life. Therefore Christ was stuck in our mud, namely, in the lusts of our flesh, which leads Him into the deep and the abyss. And the sin of the flesh is properly compared to the deep, for among all things it especially blinds and makes us altogether a beast. Therefore there is no sure standing there. –Martin Luther