Patristic Wisdom: Looking to the Eighteenth Sunday after Pentecost

You therefore, my son, be strong in the grace that is in Christ Jesus. And the things that you have heard from me among many witnesses, commit these to faithful men who will be able to teach others also. You therefore must endure hardship as a good soldier of Jesus Christ. No one engaged in warfare entangles himself with the affairs of this life, that he may please him who enlisted him as a soldier. And also if anyone competes in athletics, he is not crowned unless he competes according to the rules. The hardworking farmer must be first to partake of the crops. Consider what I say, and may the Lord give you understanding in all things. Remember that Jesus Christ, of the seed of David, was raised from the dead according to my gospel, for which I suffer trouble as an evildoer, even to the point of chains; but the word of God is not chained. Therefore I endure all things for the sake of the elect, that they also may obtain the salvation which is in Christ Jesus with eternal glory. This is a faithful saying:

For if we died with Him,
We shall also live with Him.
If we endure,
We shall also reign with Him.
If we deny Him,
He also will deny us.
If we are faithless,
He remains faithful;
He cannot deny Himself. (2 Timothy 2:1–13)

What is the world but a sort of arena of continual strife? Wherefore also in the Apocalypse the Lord says, To him that overcomes will I give a crown of life; and Paul says, I have fought a good fight; and in another place, No man is crowned except he strive lawfully. He who institutes this combat is Almighty God. Now he who in this world offers a combat, does he not first provide all things which are necessary thereto, and prepare the chaplets of victory before he summons the athletics to contend for the prize; and all this that the conqueror may not suffer delay, but retire from the contest crowned with his reward? Now the rewards of man are the fruits of the earth and the lights of heaven; the former for the use of this present life, the latter for the hope of life eternal.

As a wrestler therefore he enters the lists last of all; he raises his eyes to heaven, he sees that even the heavenly creation was made subject to vanity, not willingly, but by reason of him who hath subjected the same in hope. He sees that the whole creation groaneth in pain together, waiting for redemption. He sees that labor awaits us all. He raises his eyes, he sees the circlets of lights, he surveys the orbs of the moon and stars: For the just, who overcome, shall be as the stars in heaven. And he chastises his body, that it may not be his enemy in the combat, he anoints it with the oil of mercy, he exercises it with daily trials of virtue, he smears himself with dust, he runs to the goal of the course but not as uncertainly, he aims his blows, he darts forth his arms, but not into empty space, he strikes the adversary whom he sees not, for he has respect to Him alone to Whom all enemies give way, even those who are invisible, in Whose Name the powers of the air were turned aside. It is he therefore who poises the blow, but it is Christ Who strikes, it is he who lifts up his heel, but Christ Who directs it to the ground. Lastly, although Paul saw not those whom he struck, he was not as one that beats the air, because by the preaching of Christ he wounded those evil spirits which assaulted him. Rightly therefore did man, for whom a race was prepared, enter the course last, that he might be preceded by heaven which was to be, as it were, his reward.

Ambrose of Milan, Letter to Horontianus 43.4–5