Whether it is lawful for a bishop on account of bodily persecution to abandon the flock committed to his care?

Objections

Objection 1 : It would seem that it is unlawful for a bishop, on account of some temporal persecution, to withdraw his bodily presence from the flock committed to his care. For our Lord said (Jn. 10:12) that he is a hireling and no true shepherd, who "seeth the wolf coming, and leaveth the sheep and flieth": and Gregory says (Hom. xiv in Ev.) that "the wolf comes upon the sheep when any man by his injustice and robbery oppresses the faithful and the humble." Therefore if, on account of the persecution of a tyrant, a bishop withdraws his bodily presence from the flock entrusted to his care, it would seem that he is a hireling and not a shepherd.
Objection 2 : Further, it is written (Prov. 6:1): "My son, if thou be surety for thy friend, thou hast engaged fast thy hand to a stranger," and afterwards (Prov. 6:3): "Run about, make haste, stir up thy friend." Gregory expounds these words and says (Pastor. iii, 4): "To be surety for a friend, is to vouch for his good conduct by engaging oneself to a stranger. And whoever is put forward as an example to the lives of others, is warned not only to watch but even to rouse his friend." Now he cannot do this if he withdraw his bodily presence from his flock. Therefore it would seem that a bishop should not on account of persecution withdraw his bodily presence from his flock.
Objection 3 : Further, it belongs to the perfection of the bishop's state that he devote himself to the care of his neighbor. Now it is unlawful for one who has professed the state of perfection to forsake altogether the things that pertain to perfection. Therefore it would seem unlawful for a bishop to withdraw his bodily presence from the execution of his office, except perhaps for the purpose of devoting himself to works of perfection in a monastery.