Ambrosiaster : Some of Paul's sleepless nights were voluntary, but others were forced on him. When he was in dire straits, he had to stay awake and seek God's help. Furthermore he taught not only in the daytime but at night as well. He was cold and exposed when he was shipwrecked on the island of Malta, where the local people came to his rescue.. — COMMENTARY ON PAUL'S EPISTLES Basil of Caesarea : Such exertion is beneficial not only for bringing the body into subjection but also for showing charity to our neighbor, so that through us God might grant sufficiency to the weak among us. — THE LONG RULES 37 John Chrysostom : Was Paul in poverty or in wealth? did he suffer hunger, or did he not? You may hear himself saying, "In hunger and thirst." Did the prophets suffer hunger, or did they not? They too had a hard time of it. "Again, you fetch up Paul to me, again the prophets, some ten or twenty men." But whence shall I bring examples? "Show me from the many some who bear ills nobly." But the rare is ever such: however, if you will, let us examine the matter as it is in itself. — Homily on Acts 51 John Chrysostom : "In labor and travail." Perils succeed to labors, labors to perils, one upon other and unintermitted, and allowed him not to take breath even for a little. — Homily 25 on 2 Corinthians Philoxenus of Mabbug : And he was occupied in fasting and prayer during the whole of the remaining period of his life after his election, even as he himself testifieth everywhere concerning his fasting, and his prayer, and his many tribulations which he bore for the sake of the Gospel, and with all his other labours and afflictions he reckoned frequent fasting, saying, "In fasting often, in watching often, in hunger often, in cold and in nakedness." — 13 Ascetic Discourses, Discourse 11 -- On Abstinence Tertullian : Thereafter He prescribed to fasts a law-that they are to be performed "without sadness: " for why should what is salutary be sad? He taught likewise that fasts are to be the weapons for battling with the more direful demons: for what wonder if the same operation is the instrument of the iniquitous spirit's egress as of the Holy Spirit's ingress? Finally, granting that upon the centurion Cornelius, even before baptism, the honourable gift of the Holy Spirit, together with the gift of prophecy besides, had hastened to descend, we see that his fasts had been heard, I think, moreover, that the apostle too, in the Second of Corinthians, among his labours, and perils, and hardships, after "hunger and thirst," enumerates "fasts" also "very many" — On Fasting