On July 12 (June 29 according to Julian Calendar) the Orthodox Church observes the memory of the Holy and All-Praised Leaders of the Apostles Saints Peter and Paul.

The Feast of Saints Peter and Paul concludes one of the four major fasting periods of the Orthodox Church.

Here is what Saint of Augustin of Hippo wrote about Saints Peter and Paul in his sermon for this feast:

… After His Resurrection the Lord entrusted the Apostle Peter to shepherd His spiritual flock not because, that among the disciples only Peter alone was pre-deserved to shepherd the flock of Christ, but Christ addresses Himself chiefly to Peter because, that Peter was first among the Apostles and as such the representative of the Church; besides which, having turned in this instance to Peter alone, as to the top Apostle, Christ by this confirms the unity of the Church. “Simon of John” — says the Lord to Peter — “lovest thou Me?” — and the Apostle answered: “Yea, Lord, Thou knowest that I love Thee”; and a second time it was thus asked, and a second time he thus answered; being asked a third time, seeing that as it were not believed, he was saddened. But how is it possible for him not to believe That One, Who knew his heart? And wherefore then Peter answered: “Lord, Thou knowest all; Thou knowest that I love Thee.” “And sayeth Jesus to him” all three times “Feed My sheep” (John 20:15-17).

… The Apostle Paul, formerly Saul, was changed from a robbing wolf into a meek lamb. Formerly he was an enemy of the Church, then is manifest as an Apostle. Formerly he stalked it, then preached it. Having received from the high priests the authority at large to throw all Christians in chains for execution, he was already on the way, he breathed out “threatenings and slaughter against the disciples of the Lord” (Acts 9:1), he thirsted for blood, but “He that dwells in the Heavens shall laugh him to scorn” (Ps 2:4). When he, “having persecuted and vexed” in such manner “the Church of God” (1Cor.15:9; Acts 8:5), he came near Damascus, and the Lord from Heaven called to him: “Saul, Saul, why persecutest thou Me?” and I am here, and I am there, I am everywhere: here is My head; there is My body. There becomes nothing of a surprise in this; we ourselves are members of the Body of Christ. “Saul, Saul, why persecutest thou Me; it is hard for thee to kick against the goad” (Acts 9:4-5). Saul, however, “trembling and frightened”, cried out: “Who art Thou, Lord?” The Lord answered him, “I am Jesus Whom thou persecutest.”

…And so, brethren, celebrating now the memory of the holy Apostles Peter and Paul, remembering their venerable sufferings, we esteem their true faith and holy life, we esteem the innocence of their sufferings and pure confession. Loving in them the sublime quality and imitating them by great exploits, “in which to be likened to them” (2 Thess 3: 5-9), and we shall attain to that eternal bliss which is prepared for all the saints. The path of our life before was more grievous, thornier, harder, but “we also are compassed about with so great a cloud of witnesses” (Heb 12: 1), having passed by along it, made now for us easier, and lighter, and more readily passable. First there passed along it “the author and finisher of our faith,” our Lord Jesus Christ Himself (Heb 12: 2); His daring Apostles followed after Him; then the martyrs, children, women, virgins and a great multitude of witnesses. Who acted in them and helped them on this path? He Who said, “Without Me ye can do nothing” (John 15: 5).

Troparion and Kontakions Of The Feast

Troparion – Tone 4

First-enthroned of the apostles,
teachers of the universe:
Entreat the Master of all
to grant peace to the world,
and to our souls great mercy!

Kontakion – Tone 2

O Lord, You have taken up to eternal rest
and to the enjoyment of Your blessings
the two divinely-inspired preachers, the leaders of the Apostles,
for You have accepted their labors and deaths as a sweet-smelling sacrifice,
for You alone know what lies in the hearts of men.

Kontakion – Tone 2

Today Christ the Rock glorifies with highest honor
The rock of Faith and leader of the Apostles,
Together with Paul and the company of the twelve,
Whose memory we celebrate with eagerness of faith,
Giving glory to the one who gave glory to them!