All things flow out from God, and all will ultimately return to Him. The first emanation is the Thing in itself ([Greek: auto to einai]), which corresponds to the Plotinian [Greek: Nous], and to the Johannine Logos. He also calls it "Life in itself" and "Wisdom in itself" ([Greek: autozôê, autosophia]). Of this he says, "So then the Divine Wisdom in knowing itself will know all things. It will know the material immaterially, and the divided inseparably, and the many as one ([Greek: heniaiôs]), knowing all things by the standard of absolute unity." These important speculations are left undeveloped by Dionysius, who merely states them dogmatically. The universe is evolved from the Son, whom he identifies with the "Thing in itself," "Wisdom," or "Life in itself." In creation "the One is said to become multiform." The world is a necessary process of God's being. He created it "as the sun shines," "without premeditation or purpose." The Father is simply One; the Son has also plurality, namely, the words (or reasons) which make existence ([Greek: tous ousiopoious logous]), which theology calls fore-ordinations ([Greek: proorismous]). But he does not teach that all separate existences will ultimately be merged in the One. The highest Unity gives to all the power of striving, on the one hand, to share in the One; on the other, to persist in their own individuality. And in more than one passage he speaks of God as a Unity comprehending, not abolishing differences.[165] "God is before all things"; "Being is in Him, and He is not in Being." Thus Dionysius tries to safeguard the transcendence of God, and to escape Pantheism. The outflowing process is appropriated by the mind by the _positive_ method--the downward path through finite existences: its conclusion is, "God is All." The return journey is by the _negative_ road, that of ascent to God by abstraction and analysis: its conclusion is, "All is not God.[166]" The negative path is the high road of a large school of mystics; I will say more about it presently. The mystic, says Dionysius, "must leave behind all things both in the sensible and in the intelligible worlds, till he enters into the darkness of nescience that is truly mystical." This "Divine darkness," he says elsewhere, "is the light unapproachable" mentioned by St. Paul, "a deep but dazzling darkness," as Henry Vaughan calls it. It is dark through excess of light[167]. This doctrine really renders nugatory what he has said about the persistence of distinctions after the restitution of all things; for as "all colours agree in the dark," so, for us, in proportion as we attain to true knowledge, all distinctions are lost in the absolute.