What is necessary to have peace in soul and body? We must love all men as ourself, and be ready for death at all times.

St. Silouan the Athonite

O Lord and Creator of all, and especially of Your creature, man: You are the God and Father and ruler of Your children; You are the Lord of life and death; You are the guardian and benefactor of our souls.  You fashion and transform all things in their due season through Your creating Word, as You know to be best in Your deep wisdom and providence.  Receive now those who have gone ahead of us in our journey from this life.  Receive us too at the proper time, when You have guided us in our bodily life as long as may be for our profit.  Receive us prepared indeed by fear of You, but not troubled, not shrinking back on that day of death or uprooted by force like those who are lovers of the world and the flesh.  Instead, may we set out eagerly for that everlasting and blessed life which is in Christ Jesus our Lord, to whom be glory forever and ever.  Amen.

St. Gregory the Theologian

A sign of true repentance is the acknowledgment that we deserve all the afflictions, visible and invisible, that come upon us, and even greater ones.

St. John Climacus

Only the foolish think that suffering is evil. A sensible man knows that suffering is not evil but only the manifestation of evil and healing from evil. Only sin in a man is a real evil, and there is no evil outside sin. Everything else that men generally call evil is not, but is a bitter medicine to heal from evil. The sicker the man, the more bitter the medicine that the doctor prescribes for him. At times, even, it seems to a sick man that the medicine is worse and more bitter than the sickness itself! And so it seems at times to the sinner: the suffering is harder and more bitter than the sin committed. But this is only an illusion – a very strong self-delusion. There is no suffering in the world that could be anywhere near as hard and destructive as sin is. All the suffering borne by men and nations is none other than the abundant healing that eternal Mercy offers to men and nations to save them from eternal death. Every sin, however small, would inevitably bring death if Mercy were not to allow suffering in order to sober men up from the inebriation of sin; for the healing that comes through suffering is brought about by the grace-filled power of the Holy and Life-giving Spirit. 

Blessed is the man who uses his sufferings, knowing that all suffering in this brief life is loosed on men by God in His love for mankind, for the benefit and assistance of men. In His mercy, God looses suffering on men because of their sins – by His mercy and not His justice. For, if it were by His justice, every sin would inevitably bring death, as the Apostle says: “Sin, when it is finished, bringeth forth death” (James 1: 15). In place of death, God gives healing through suffering. Suffering is God’s way of healing the soul of its sinful leprosy and its death.

St. Nikolai Velimirovich

Thanksgiving dulls the fierceness of your illness!  Thanksgiving brings the ailing person consolation!  The tutored heart, sweetened by thanksgiving, is renewed through the power of a living faith.  Illumined by the sudden light of faith, the mind begins to contemplate the divine Providence of God... The sickbed is often the place where one gains the knowledge of God and the knowledge of self.  The suffering of the body often brings spiritual joys, and the sickbed is often watered with tears of repentance and tears of joy in God.

St. Ignatius Brianchaninov

When God revealed himself, he united himself with our mortal nature in order to deify humanity through this close relation with deity. Since this is so, through his flesh, constituted by bread and wine, he implants himself in all believers.

St. Gregory of Nyssa

By the death of martyrs religion has been defended, faith increased, the Church strengthened; the dead have conquered, the persecutors have been overcome.... So, too, David rejoiced in prophecy at the departure of his own soul, saying: ‘Precious in the sight of the Lord is the death of His saints.’ He esteemed death better than life. The death itself of the martyrs is the prize of their life. And again, by the death of those at variance hatred is put an end to.

St. Ambrose of Milan

While the dying person addresses his last words to us, suddenly his tongue is at a loss, his eyes dim, his mouth falls silent, his voice paralyzed when the Lord’s troops have arrived, when His frightening armies overwhelm him, when the divine bailiffs invite the soul to be gone from the body, when the inexorable lays hold of us to drag us to the tribunal… Then the angels take the soul and go off through the air. There stand principalities, powers and leaders of the adverse troops who govern the world, merciless accusers, strict agents of an implacable tax bureau, like so many examiners that await the soul in the air, ready to demand a reckoning, to examine everything, brandishing their claims, that is to say our sins: those of youth and of old age, those intentional and those not so, those committed by actions and those by words or thoughts. Great then is the fear of the poor soul, inexpressible its anguish when it sees itself at grips with these myriads of enemies, who stop it, push and shove it, accuse it, hinder it from dwelling in the light, from entering into the land of the living. But the holy angels, taking the soul, lead it away.

St. Ephraim of Syria

The soul is greater than the body: the body becomes sick, and with that it is finished. But a spiritual sickness extends into eternity. Deliver us, O Lord, from such illness, and grant us healing.

St Macarius of Optina

Virtue does not consist in many different visible bodily activities, but in a heart that is wise in what it hopes for, and whose actions are accompanied by a right intention.

St Isaac of Syria 

It is required that not only with the body should we fast, but with the soul. Now the soul is humbled when it does not follow wicked opinions, but feeds on becoming virtues. For virtues and vices are the food of the soul, and it can eat either of these two. Bend your appetite toward virtues, as Paul says, "Being nourished by the word of truth."

St. Athanasios of Alexandria