Gregory the Dialogist

Which long for death, but it cometh not. For they desire to mortify themselves wholly, and to be entirely extinct of the life of temporal glory, but by the secret appointments of God they are often forced either to take the lead in command, or to busy themselves with dignities imposed on them, and in these circumstances they unceasingly look for a perfect mortification, but this expected death cometh not; in that the use of them is still alive to temporal glory even against their will, though they submit to that glory from the fear …

Morals on the Book of Job, Book V ↗

Thomas Aquinas

He shows that life is given to them uselessly because unhappy men desire its contrary. So he says, "Who," living in bitterness, "long for death, which does not come," that is as quickly as they would like. To show that those who are unhappy wait for death not shrinking from it but desiring it he continues, "like those who dig for buried treasure," aroused by their great desire to find the treasure by digging.

Commentary on Job ↗