XIV. Fasting, according to the signification of the word, is abstinence from food. Now food makes us neither more righteous nor less. But mystically it shows that, as life is maintained in individuals by sustenance, and want of sustenance is the token of death; so also ought we to fast from worldly things, that we may die to the world, and after that, by partaking of divine sustenance, live to God. Especially does fasting empty the soul of matter, and make it, along with the body, pure and light for the divine words. Worldly food is, then, the former life and sins; but the divine food is faith, hope, love, patience, knowledge, peace, temperance. For “blessed are they that hunger and thirst after” God's “righteousness; for they shall be filled.” The soul, but not the body, it is which is susceptible of this craving.
XV. The Saviour showed to the believing apostles prayer to be stronger than faith in the case of a demoniac, whom they could not cleanse, when He said, Such things are accomplished by prayer. He who has believed has obtained forgiveness of sins from the Lord; but he who has attained knowledge, inasmuch as he no longer sins, obtains from himself the forgiveness of the rest.
XVI. For as cures, and prophecies, and signs are performed by the agency of men, God working in them, so also is Gnostic teaching. For God shows His power through men. And the prophecy rightly says, “I will send to them a man who will save them.” Accordingly He sends forth at one time prophets, at another apostles, to be saviours of men. Thus God does good by the agency of men. For it is not that God can do some things, and cannot do others: He is never powerless in anything. No more are some things done with, and some things against His will; and some things by Him, and some things by another. But He even brought us into being by means of men, and trained us by means of men.
XVII. God made us, having previously no existence. For if we had a previous existence, we must have known where we were, and how and why we came hither. But if we had no pre-existence, then God is the sole author of our creation. As, then, He made us who had no existence; so also, now that we are made, He saves us by His own grace, if we show ourselves worthy and susceptible; if not, He will let us pass to our proper end. For He is Lord both of the living and the dead.
XVIII. But see the power of God, not only in the case of men, in bringing to existence out of non-existence, and making them when brought into being grow up according to the progress of the time of life, but also in saving those who believe, in a way suitable to each individual. And now He changes both hours, and times, and fruits, and elements. For this is the one God, who has measured both the beginning and the end of events suitably to each one.
XIX. Advancing from faith and fear to knowledge, man knows how to say Lord, Lord; but not as His slave, he has learned to say, Our Father. Having set free the spirit of bondage, which produces fear, and advanced by love to adoption, he now reverences from love Him whom he feared before. For he no longer abstains from what he ought to abstain from out of fear, but out of love clings to the commandments. “The Spirit itself,” it is said, “bears witness when we cry, Abba, Father.”
XX. Now the Lord with His precious blood redeems us, freeing us from our old bitter masters, that is, our sins, on account of which the spiritual powers of wickedness ruled over us. Accordingly He leads us into the liberty of the Father—sons that are co-heirs and friends. “For,” says the Lord, “they that do the will of my Father are my brethren and fellow-heirs.” “Call no man, therefore, father to yourselves on earth.” For it is masters that are on earth. But in heaven is the Father, of whom is the whole family, both in heaven and on earth. For love rules willing hearts, but fear the unwilling. One kind of fear is base; but the other, leading us as a pedagogue to good, brings us to Christ, and is saving.
XXI. Now if one has a conception of God, it by no means corresponds with His worthiness. For what can the worthiness of God be? But let him, as far as is possible, conceive of a great and incomprehensible and most beautiful light; inaccessible, comprehending all good power, all comely virtue; caring for all, compassionate, passionless, good; knowing all things, foreknowing all things, pure, sweet, shining, stainless.
XXII. Since the movement of the soul is self-originated, the grace of God demands from it what the soul possesses, willingness as its contribution to salvation. For the soul wishes to be its own good; which the Lord, however, gives it. For it is not devoid of sensation so as to be carried along like a body. Having is the result of taking, and taking of willing and desiring; and keeping hold of what one has received, of the exercise of care and of ability. Wherefore God has endowed the soul with free choice, that He may show it its duty, and that it choosing, may receive and retain.
XXIII. As through the body the Lord spoke and healed, so also formerly by the prophets, and now by the apostles and teachers. For the Church is the minister of the Lord's power. Thence He then assumed humanity, that by it He might minister to the Father's will. And at all times, the God who loves humanity invests Himself with man for the salvation of men—in former times with the prophets, and now with the Church. For it is fitting that like should minister to like, in order to a like salvation.
XXIV. For we are of the earth....Cæsar is the prince, for the time being, whose earthly image is the old man, to which he has returned. To him, then, we are to render the earthly things, which we bore in the image of the earthly, and the things of God to God. For each one of the passions is on us as a letter, and stamp, and sign. Now the Lord marks us with another stamp, and with other names and letters, faith instead of unbelief, and so forth. Thus we are translated from what is material to what is spiritual, “having borne the image of the heavenly.”
XXV. John says: “I indeed baptize you with water, but there comes after me He that baptizes with the Spirit and fire.” But He baptized no one with fire. But some, as Heraclius says, marked with fire the ears of those who were sealed; understanding so the apostolic saying, “For His fan is in His hand, to purge His floor: and He will gather the wheat into the garner; but the chaff He will burn with fire unquenchable.” There is joined, then, the expression “by fire” to that “by the Spirit;” since He separates the wheat from the chaff, that is, from the material husk, by the Spirit; and the chaff is separated, being fanned by the wind: so also the Spirit possesses a power of separating material forces. Since, then, some things are produced from what is unproduced and indestructible,— that is, the germs of life—the wheat also is stored, and the material part, as long as it is conjoined with the superior part, remains; when separated from it, it is destroyed; for it had its existence in another thing. This separating element, then, is the Spirit, and the destroying element is the fire: and material fire is to be understood. But since that which is saved is like wheat, and that which grows in the soul like chaff, and the one is incorporeal, and that which is separated is material; to the incorporeal He opposes spirit, which is rarefied and pure— almost more so than mind; and to the material He opposes fire, not as being evil or bad, but as strong and capable of cleansing away evil. For fire is conceived as a good force and powerful, destructive of what is baser, and conservative of what is better. Wherefore this fire is by the prophets called wise.
Source: Excerpts (New Advent)