Nicene and Post-Nicene Fathers, Ser. II, Vol. XI:
The Works of John Cassian.: Chapter XXXII. How pride which is so destructive of all virtues can itself be destroyed by true humility.

Chapter XXXII.

How pride which is so destructive of all virtues can itself be destroyed by true humility.

Wherefore the Christian athlete who strives lawfully in the spiritual combat and desires to be crowned by the Lord, should endeavour by every means to destroy this most fierce beast, which is destructive of all virtues, knowing that as long as this remains in his breast he not only will never be free from all kinds of evils, but even if he seems to have any good qualities, will lose them by its malign influence. For no structure (so to speak) of virtue can possibly be raised in our soul unless first the foundations of true humility are laid in our heart, which being securely laid may be able to bear the weight of perfection and love upon them in such a way that, as we have said, we may first show to our brethren true humility from the very bottom of our heart, in nothing acquiescing in making them sad or in injuring them: and this we cannot possibly manage unless true self-denial, which consists in stripping and depriving ourselves of all our possessions, is implanted in us by the love of Christ. Next the yoke of obedience and subjection must be taken up in simplicity of heart without any pretence, so that, except for the commands of the Abbot, no will of our own is alive in us. But this can only be ensured in the case of one who considers himself not only dead to this world, but also unwise and a fool; and performs without any discussion whatever is enjoined him by his seniors, believing it to be divine and enjoined from heaven.