Job 38:19

"Where is the way to the dwelling of light, and where is the place of darkness?" He says what he had said before but more clearly, that is, that the course of human life is regulated by the alternation of times, so that at one time people dedicate themselves to work; in another time, the vigor of the body, which exhaustion had taken away, is returned to them.

"In what regions does the light dwell? It is still He who teaches it, for his word spreads the light, and gives intelligence to the little children (1). "What is the abode of darkness?" We also know Him who said, "Come near him and you will be enlightened (2). It is to teach us that we become darkness when we go away from Him by refusing to be like little children. For the beginning of the pride of man is to separate from God (3). So those who did not glorify him, and did not give him thanks, lost themselves in the vanity of their thoughts, and their foolish heart was darkened; they became the habitation of darkness. Perhaps darkness is also the place where stubborn sinners fall: these would then be darkness and they would live a truly unknown place for all men. Likewise the dwelling of light would be this land of the living; the bliss given to those who persevere in faith, hope and charity; which were once darkness and are now light in the Lord (5).

Tell Me, if thou knowest all things, in what path the light dwelleth, and what is the place of darkness? that thou mayest take each of them to the bounds thereof, and understand the paths to the house thereof. Blessed Job is tried with a weighty question, in that he is examined as to the way of light and the place of darkness, whether he should bring them each to their boundaries, and should understand the paths to the house thereof. For what is understood by the word 'light' but righteousness? and what is designated by 'darkness' but iniquity? Whence it is said to some who had been converted from the wickedness of sins, Ye were sometimes darkness, but now are ye light in the Lord. And it is stated of some who continue in sin, They that sleep, sleep in the night. It is said therefore to blessed Job, Tell Me, if thou knowest all things, in what path the light dwelleth, and what is the place of darkness? As if it were said to him, If thou imaginest that thou hast perfect wisdom, tell Me, either into whose heart that innocency, which is now wanting, is coming, or in whose heart that wickedness, which now exists, remains. In what path the light dwelleth: that is, whose mind righteousness comes and fills. And what is the place of darkness, that is, in whom does blind iniquity remain. That thou mayest take each of them to the bounds thereof, that is, that thou mayest decide whether he who is now seen to be wicked, finishes his life in iniquity, and whether he who is now seen to be righteous, terminates the conclusion of his life with the perfection of righteousness. And understand the paths to the house thereof: that is, that thou mayest consider and discern, either for whom perseverance in good deeds secures an eternal mansion in the Kingdom, or whom evil habits, binding to the end, condemn to eternal punishment. For 'house' is put for resting place, and 'path' for conduct. A path therefore leads to a house, because our doings lead on to our resting place. But what man could speak when questioned on these points? who could hear them at least without fear? For we daily see many who shine forth with the light of righteousness, and who are yet at their close obscured with the darkness of wickedness. And we behold many involved in the darkness of sins, and yet at the end of their life suddenly set free and restored to the light of righteousness. We also know that…