By stinting the stomach, the heart is humbled

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 14 ~ On Gluttony

¶22. By stinting the stomach, the heart is humbled; but by pleasing the stomach, the mind becomes proud.

Who would not run this fair course of obedience?

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 4 ~ On Obedience

¶ 105. From obedience comes humility, as we have already said earlier. From humility comes discernment as the great Cassian has said with beautiful and sublime philosophy in his chapter on discernment. From discernment comes clairvoyance, and from clairvoyance comes foreknowledge. And who would not run this fair course of obedience, seeing such blessings in store for him? It was of this great virtue of obedience that the good Psalmist said: Thou hast in Thy goodness prepared for the poor, obedient soul, O God, Thy presence in his heart.

Humility

Venerable Anthony the Great
The Sayings of the Desert Fathers

¶7. Abba Anthony said, 'I saw the snares that the enemy spreads out over the world and I said groaning, "What can get through from such snares?" Then I heard a voice saying to me, "Humility." '

One virtue only which the demons cannot imitate

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 25 ~ On Humility

¶17. In the whole universe there is one place that has only once seen the sun, and there is one thought which has often given birth to humility. And there was one day only on which the whole world rejoiced, and there is one virtue only which the demons cannot imitate.

Commentaries suggest the following interpretation:
"One place" = Bottom of the Red Sea.
"One thought" = Remembrance of Death and Crucifixion
"One day" = Christ's Resurrection, Christ's Nativity or Noah's Leaving the Ark
"One virtue" = Humility.

Walk the way of humility

Venerable John Climacus ~ The Ladder of Divine Ascent
Step 25 ~ On Humility

¶58. The Master, knowing that the virtue of the soul is modeled on outward behavior, took a towel and showed us how to walk the way of humility. For the soul becomes like its bodily occupations. It conforms itself to its activities and takes its shape from them. Authority served as a ground for arrogance for one of the angels, although that was not why it was conferred on him.