The right practice of abstinence is needful not only to the mortification of the flesh but also to the purification of the mind. For the mind then only keeps holy and spiritual fast when it rejects the food of error and the poison of falsehood.
Whence is it that we are Christians? Through our faith, would be the universal answer. And in what way are we saved? Plainly because we were regenerate through the grace given in our baptism.
We beseech you, O most holy martyrs, who cheerfully suffered torments and death for his love, and are now more familiarly united to him, that you intercede with God for us slothful and wretched sinners, that he bestow on us the grace of Christ, by which we may be enlightened and enabled to love him.
Observe at the same time that the mystery consists in the very office of humility, for Christ says: 'If I, your Lord and Master, have washed your feet; how much more ought you to wash one another's feet.' For, since the Author of Salvation Himself redeemed us through His obedience, how much more ought we His servants to offer the service of our humility and obedience.
The Spirit is not united to the soul by drawing near to its place (for how may what is corporeal draw near to what in incorporeal?), but through the withdrawal of the passions; which, drawing close to the soul, through its affection for the flesh, have drawn it away from its friendship with God. When a man becomes clean of the stain he received through sin, and has returned to his natural beauty, restoring to its former resemblance the royal image within him, only then may he draw near to the Paraclete (Holy Spirit).
No Christian believing rightly in God should ever be off his guard. He should always be on the look-out for temptation, so that when it comes he will not be surprised or disturbed, but will gladly endure the toil and affliction it causes, and so will understand what he is saying when he chants with the prophet: 'Prove me, O Lord, and try me' (Ps. 26:2 LXX). For the prophet did not say, 'Thy correction has destroyed me,' but, 'it has upheld me to the end' (Ps. 18:35 LXX).
Anyone who truly wants to follow God must be free from the bonds of attachment to this life. To do this we must make a complete break with our old way of life. Indeed, unless we avoid all obsession with the body and with the concerns of this world, we shall never succeed in pleasing God. We must depart as it were to another world in our way of thinking, as the Apostle said: 'Our citizenship is in heaven'. For the Lord said quite clearly: 'Any of you who does not renounce everything he cannot be my disciple'. Once we have managed to achieve this, we must remain ever on our guard to ensure that we never lose the thought of God, or destroy the memory of His wonders with our wandering minds. For we must keep the pure thought of God continually imprinted in our souls, as if it were an indelible seal.
For by prayer we obtain the divine favor, by fasting we extinguish the concupiscences of the flesh, by almsgiving sins are redeemed (Dan. iv. 24); and by all three together, the image of God is renewed in us, provided that we are ever ready in His praise, eager without ceasing for our own purification, and disposed at all times to assist our neighbor.
Habit forms from custom, and habit seems to accustom itself to nature. It is much worse and more difficult to change nature. However, with God it is possible. For nature does not set itself against God.
