In the laws of Moses there were two grades of uncleanness defined—uncleanness of seven days, and uncleanness till the even. The former was a symbol of that essential corruption which is in us by nature, to which are essential the redeeming blood of Christ and the renewing of the Holy Spirit, without which no man can see God in peace. Uncleanness till the even symbolized those casual defilements to which God’s renewed people are liable by contact with the evil of the world. The ritual, concerning the uncleanness of seven days, was designed to signalize the light in which man’s apostate nature, and the depravity and sin thence resulting, appear in the sight of a God of ineffable holiness. To this conception the word _unclean_ was designed to give expression, the intense meaning of which is liable to escape the casual reader of the Scriptures. It signified, not the mere external soiling of the living person, but death, corruption, and rottenness within the heart, the fermenting source of pollution poured forth in the outward life. To impress us with a just sense of the exceeding evil of this thing the Spirit employs every variety of figure expressive of deformity and loathsomeness. In the primitive faith, of which the book of Job is a record, it is characterized in language which is a key-note to all the Scriptures on the subject. “Behold he putteth no trust in his saints” (his holy angels); “yea, the heavens are not pure in his sight. How much more abominable and filthy is man, which drinketh iniquity like water.”—Job xv, 15, 16. Says the Psalmist, “The Lord looked down from heaven upon the children of men, to see if there were any that did understand and seek God. They are all gone aside; they are all together become filthy.”—Psa. xiv, 3. Here the word “filthy” is in the margin rendered “stinking.” It is the same in the original as in the above place in Job, and means the offensiveness of putrefaction. David, in his penitential Psalm, indicates his sense of this radical evil of his nature. “Wash me thoroughly from mine iniquity and _cleanse_ me from my sin.... Behold I was shapen in iniquity, and in sin did my mother conceive me. Behold thou desirest truth in the _inward parts_: and in the _hidden part_ thou shalt make me to know wisdom. Purge me with hyssop, and I shall be _clean_; wash me and I shall be whiter than snow.... Create in me a _clean heart_, O God; and renew a right spirit within me.”—Psa. li, 2-10. Isaiah and other sacred writers represent the same evil by the figures of the vomit and filthiness of a drunken debauch, and by every kind of abominable and loathsome thing. (Isa. xxviii, 8; Prov. xxx, 12.) By the designation, unclean, the moral deformity and offensiveness of Satan and the “unclean spirits,” his angels, are described. And in the accounts of the riches of grace and glory in store for the church, the crowning feature is the exclusion of the unclean. “A highway shall be there, and a way; and it shall be