26. For when the several mystical truths are recognised in the secret words of the Prophets by them that believe, what else is it, than that ‘deep things are discovered out of darkness?’ Whence too ‘Truth’ Himself, speaking in parables to the disciples, saith, What I tell you in darkness, that speak ye in light. [Matt. 10, 27] For when by explaining we unravel the mystical knots of allegories, then we as it were ‘speak in light, what we have heard in darkness.’ Now ‘the shadow of death’ was the hardness of the old Law, which made every one that sinned liable to be punished with the death of the body. But when our Redeemer tempered by mildness the harshness of the sanctions of the Law, nor any longer ordained death of the flesh to be inflicted for sin, but shewed how greatly the death of the spirit was to be dreaded, then, surely, ‘He brought out to light the shadow of death.’ For this death, wherein the flesh is severed from the soul, is a ‘shadow’ of that death, wherein the soul...
“Revealing deep things out of darkness, and he has brought into light the shadow of death.” The literal meaning is, “He manifests the things which are hidden to all, and preserves those who are in danger and close to death.” He calls danger “the shadow of death,” because, as shadow is very close to the body that produces it, so danger is very close to the death that causes it. However, the profound meaning of this sentence appears to announce prophetically the advent of the Lord, who said to the prisoners, “Come out, and to those who are in the shadow, show yourselves,” “and appeared to those, who sit in darkness and in the shadow of death.” - "Commentary on Job 12.22"