They say that Abba Macarius the Egyptian [St. Macarius the Great] on one occasion went up from Scete to the Nitrian mountain, and as he drew near to a certain place, he said to his disciple, "Pass on a little in front of me"; and when he had done so there met him a certain heathen priest, who was running along and carrying some wood about the time of noon. And that brother cried out to him and said, "O minister to devils, where run thou?"  And the priest turned round and smote him with many severe blows, and he left him with but very little breath remaining in him, and he took up his wood and went on his way; and when he had gone on a little further the blessed Macarius met him on his journey, and said to him, "May you be helped, O man of labours?"  And the priest was astonished, and came to him and said, "What fair thing have you seen in me that you should salute me [in this gracious fashion] ?"  And the old man said to him, "I see that you toil, and that you do not know that you are toiling for naught"; then he said to the old man, "At your salutation I also was very sorry, and I learned that you did belong to the Great God. But a wicked monk met me just before you didst, and he cursed me, and I smote him even to death."  And the old man knew that it was his disciple [of whom he spake], and the priest laid hold upon the feet of Macarius, and said to him, "I will not let you [go] until you make me a monk"; and they came to the place where the brother was lying, and they carried him and brought him to the church of the mountain. Now when the fathers saw the heathen priest with him, they marvelled that he had been converted from the error which he had held; and Macarius took him and made him a monk, and through him many of the heathen became Christians. And Abba Macarius said, " ' An evil word makes wicked even those who are good, and a good word makes good even those who are wicked,' as it is written."

from Sayings of the Holy Desert Fathers

Three old men once came to Abba Sisoes [St. Sisoes the Great] because they had heard that he was a great man. And the first one said unto him, "Father, how can I escape from the river of fire?" And Abba Sisoes answered him never a word. Then the second old man said to him, "Father, how can I escape from the gnashing of teeth, and from the worm which never dies?" And Abba Sisoes answered him never a word. Then the third old man said to him, "Father, what will I do? For the remembrance of the outer darkness troubles me." And Abba Sisoes answered and said to them, "I never think on any of these things, but I believe that God is Merciful, and that He will show mercy to me"; then the old men went away grieved at the answer which Abba Sisoes had spoken to them. Now because he did not wish to send them away sorrowful, he brought them back, and said to them, "Blessed are ye, O my brothers, for I have been jealous of you"; and they said to him, "In what matter have you been jealous of us?" And he said, "The first one of you spake about a river of fire; and the second spake about the gnashing of teeth and the worm which dies not; and the third spake about the outer darkness; if remembrances of this kind have dominion over your minds it is impossible for you to commit sin. What can I do who am stubborn of heart? For hardness of heart will not allow me to perceive even that there a punishment for men existeth, and because of this I sin every hour." And when the old men had heard these words, they made excuses to him, and said, "In very truth according to what we have heard, even so have we seen."

from Sayings of the Holy Desert Fathers

We must take care not to refer all the merits of the saints to the Lord in such a way as to ascribe nothing but what is evil and perverse to human nature, in doing which we are confuted by the evidence of the most wise Solomon, or rather of the Lord himself, whose words these are; for when the building of the temple was finished and he was praying, he spoke as follows: ‘and David my father would have built a house to the name of the Lord God of Israel: and the Lord said to David my father: Whereas thou hast thought in thine heart to build a house to my name, thou hast done well in having this same thing in thy mind.’ This thought and purpose of King David, are we to call it good and from God or bad and from man? For if the thought was good and from God, why did He by whom it was inspired refuse that it should be carried into effect? But if it is bad and from man, why is it praised by the Lord?

St. John Cassian

To admire the labours of the saints is good; to emulate them wins salvation; but to wish suddenly to imitate their life in every point is unreasonable and impossible.

St. John Climacus

Such are the souls of the saints: they love their enemies more than themselves, and in this age and in the age to come they put their neighbor first in all things, even though because of his ill-will he may be their enemy. They do not seek recompense from those whom they love, but because they have themselves received they rejoice in giving to others all that they have, so that they may conform to their Benefactor and imitate His compassion to the best of their ability; "for He is bountiful to the thankless and to sinners" (cf. Luke 6:35).

St. Peter of Damascus

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

Every Christian should find for himself the imperative and incentive to become holy. If you live without struggle and without hope of becoming holy, then you are Christians only in name and not in essence. But without holiness, no one shall see the Lord, that is to say they will not attain eternal blessedness. It is a trustworthy saying that Jesus Christ came into the world to save sinners (1 Tim. 1:15). But we deceive ourselves if we think that we are saved while remaining sinners. Christ saves those sinners by giving them the means to become saints.

St. Philaret of Moscow

If we have true love with sympathy and patient labor, we shall not go about scrutinizing our neighbor's shortcomings. As it is said, "Charity shall cover the multitude of sins" (1 Peter 4:8). . . True love screens anything of this kind, as did the saints when they saw the shortcomings of men. Were they blind? Not at all! But they simply would not let their eyes dwell on sins.

St. Dorotheos of Gaza