Gregory the Dialogist

Therefore snares are round about thee; and sudden fear troubleth thee. That man 'sudden fear doth trouble,' who neglects to consider what there is hanging over his head from the severity of the Judge, when He comes. Therefore, whereas heretics look upon the faithful people as borne down by sins of misbelief, they make it a charge that 'snares are round about them.' And because they believe that it does not foresee the future, they suppose this people under the smiting to be 'troubled with sudden fear.'

Morals on the Book of Job, Book XVI ↗

Thomas Aquinas

He then states that punishments have come upon him because of these faults, and so he says, "On that account you are surrounded with snares," for you are oppressed on all sides with adversities so that no place is open for you to escape after you have fallen into them. Nor were you even able to hide before because they came upon you suddenly, and so he says, "and sudden dread throws you into confusion," since evil things overcame him suddenly resulting in his being able to fear others also.

Commentary on Job ↗