The scheme of the Incarnation is still further drawn out, to show that this way for man’s salvation was preferable to a single fiat of God’s will. Christ took human weakness upon Him; but it was physical, not moral, weakness. In other words the Divine goodness did not change to its opposite, which is only vice. In Him soul and body were united, and then separated, according to the course of nature; but after He had thus purged human life, He reunited them upon a more general scale, for all, and for ever, in the Resurrection. — Chapters XIV through XVII.