If I wash myself; either,
1. Really, by sanctification, cleansing my heart and life from all filthiness; or rather,
2. Declaratively or judicially, i.e. if I clear myself from all imputations, and fully prove my innocency before men. With snow water, i.e. as men cleanse their bodies, and as under the law they purified themselves, with water, which he here calls water of snow, either because by its purity and brightness it resembled snow; or because in those dry countries, where fresh and pure water was scarce, snow water was much in use; or because that water might be much used among them in some of their ritual purifications, as coming down from heaven.