Christ is Preached:

Who ever saw, who ever heard of, the scholars taking greater encouragement in the dangers of their teachers? How was it that they feared not? how was it that they were not terrified? how was it that they did not say to Paul, "Physician, heal thyself," deliver thyself from thy manifold perils, and then thou will be able to procure for us those countless good things? How was it they did not say these things? How! It was because they had been schooled, from the grace of the Spirit, that these things took place not out of weakness, but out of the permission of the Christ; in order that the truth might shine abroad more largely; through bonds and imprisonments and tribulations and straits increasing and rising, to a greater volume. Thus is the power of Christ in weakness perfected. For indeed if his bonds had crippled Paul and made him cowardly; either himself or those belonging to him; one could not but feel difficulty; but if rather they prepared him to feel confidence and brought him into greater renown, one must be astounded and marvel, how through a thing involving dishonour glory was procured for the disciple--through a thing inspiring Cowardice confidence and encouragement resulted to them all. For who was not astounded at him then, seeing him encircled with a chain? Then demons took to flight all the more, when they saw him spending his time in a prison. For not so splendid does the diadem make a royal head, as the chain his hands; not owing to their proper nature, but owing to the grace that darted brightness on them. On this account it was that great encouragement resulted to the disciples. For also they saw his body indeed bound, but his tongue not bound, his hands indeed tightly manacled, but his voice unshackled, and traversing the whole world more swiftly than the solar ray. And this became to them an encouragement; learning as they did from the facts that no one of present things is to be dreaded. For when the soul has been genuinely imbued by divine longing and love, it pays regard to no one of things present; but just as those who are mad venture themselves against fire and sword and wild beasts and sea and all else, so these too, maddened with a most noble and most spiritual frenzy, a frenzy arising from sanity, used to laugh at all things that are seen. On this account, seeing their teachers bound, they the more exulted, the more prided themselves; by facts giving to their adversaries a demonstration that on all sides they were impregnable and indomitable.

St. John Chrysostom, Homily Concerning Lowliness of Mind.