Sleep is a particular state of nature, an image of death, inactivity of the senses. Sleep is one, but, like desire, its sources and occasions are many; that is to say, it comes from nature, from food, from demons, or perhaps, sometimes, from extreme and prolonged fasting, through which the flesh is weakened and at last longs for the consolation of sleep.
Let us observe and we shall find that the spiritual trumpet serves as an outward signal for the gathering of the brethren, but it is also the unseen signal for the assembly of our foes. So some of them stand by our bed, and when we get up urge us to lie down again: 'Wait,' they say, 'till the preliminary hymns are finished; then you can go to church.' Others plunge those standing at prayer into sleep. Some produce severe, unusual pains in the stomach. Others urge us on to make conversation in church. Some entice the mind to shameful thoughts. Others make us lean against the wall as though from fatigue. Sometimes they involve us in fits of yawning. Some of them bring on waves of laughter during prayer, thereby desiring to stir up the anger of God against us. Some force us to hurry the reading or chanting merely from laziness; others suggest that we should chant more slowly for the pleasure of it; and sometimes they sit at our mouths and shut them, so that we can scarcely open them. He who reckons with feeling of heart that he stands before God in prayer shall be an unshakeable pillar, and none of the aforesaid demons will make sport of him.
The fathers have laid down that psalmody is a weapon, and prayer is a wall, and honest tears are a bath; but blessed obedience in their judgment is confession of faith, without which no one subject to the passions will see the Lord.
When said with pain, the prayer gives birth to mourning. Mourning brings tears. Tears in turn give birth to purer prayer. For tears like a fragrant myrrh wash away the filth, and thus the inbreathing of God is cleansed, which like a dove is confined within four walls, as if made of the four elements.... And then, as soon as the walls break down and collapse, the dove immediately flies to the Father whence it came.
Meekness is the fellow-worker of obedience, the guide of the brotherhood, a bridle for the enraged, a check to the irritable, a minister of joy, the imitation of Christ, something proper to angels, shackles for demons, a shield against bitterness.
When can someone understand human suffering? When he also suffers. When he goes through the same, he learns and understands the other person's suffering. Otherwise, he is callous and is not grieved, unless he happens to have a good nature. But all natural attributes merit neither honor nor dishonor; achievements and falls depend on our own free will.
Just as over-drinking is a matter of habit, so too from habit comes over-sleeping. Therefore we must struggle with the question of sleep, especially in the early days of obedience, because a long-standing habit is difficult to cure.
With pain and tears you will receive grace, and again with tears and joy and thanksgiving, with fear of God you will keep it. With zeal it is drawn. With coldness and negligence it is lost.
Demons often transform themselves into angels of light and take the form of martyrs, and make it appear to us during sleep that we are in communication with them. Then, when we wake up, they plunge us into unholy joy and conceit. But you can detect their deceit by this very fact. For angels reveal torments, judgments and separations; and when we wake up we find that we are trembling and sad. As soon as we begin to believe the demons in dreams, then they make sport of us when we are awake too. He who believes in dreams is completely inexperienced. 'But he who distrusts all dreams is a wise man. Only believe dreams that warn you of torments and judgments. But if despair afflicts you, then such dreams are also from demons.
