Gregory the Dialogist

He hath fenced up my way, that I cannot pass: and He hath set darkness in my paths. He saw his 'way fenced up' with strokes, when anxiously desiring to pass into a state of security, he was not able to escape the scourges, and whereas he saw himself smitten, and yet did not find in himself a life worthy of such smiting, as it were 'in the paths' of the heart he met with 'the darkness' of his own ignorance, in that he could not fathom the cause wherefore he was so scourged. …

Morals on the Book of Job, Book XIV ↗

Thomas Aquinas

Second, a cure is found in adversities by the man himself who escapes adversities in two ways. In the first way, by his power, and he excludes this saying, "He has obstructed my path and I cannot pass," as if he should say: He has placed so many impediments to my advance that I cannot remove them. In another way by prudence, and to exclude this he applies the text, "and he placed darkness on my footpath," so that I could not see how I must go forward.

Commentary on Job ↗