The thoughts of the saints cover the world

And should any one say that the voice does not reach God, but is rolled downwards in the air, yet the thoughts of the saints cleave not the air only, but the whole world. And the divine power, with the speed of light, sees through the whole soul.

Clement of Alexandria
The Stromata, Book VII
Chapter VII

A prayer to Christ the Instructor

Be gracious, O Instructor, to us Thy children, Father, Charioteer of Israel, Son and Father, both in One, O Lord. Grant to us who obey Thy precepts, that we may perfect the likeness of the image, and with all our power know Him who is the good God and not a harsh judge. And do Thou Thyself cause that all of us who have our conversation in Thy peace, who have been translated into Thy commonwealth, having sailed tranquilly over the billows of sin, may be wafted in calm by Thy Holy Spirit, by the ineffable wisdom, by night and day to the perfect day; and giving thanks may praise, and praising thank the Alone Father and Son, Son and Father, the Son, Instructor and Teacher, with the Holy Spirit, all in One, in whom is all, for whom all is One, for whom is eternity, whose members we all are, whose glory the æons are; for the All-good, All-lovely, All-wise, All-just One. To whom be glory both now and for ever. Amen.

Clement of Alexandria
The Paedagogus, Book III
Chapter XXII

Administration of the Sacraments

But we, after we have thus washed him who has been convinced and has assented to our teaching, bring him to the place where those who are called brethren are assembled, in order that we may offer hearty prayers in common for ourselves and for the baptized [illuminated] person, and for all others in every place, that we may be counted worthy, now that we have learned the truth, by our works also to be found good citizens and keepers of the commandments, so that we may be saved with an everlasting salvation. Having ended the prayers, we salute one another with a kiss.There is then brought to the president of the brethren bread and a cup of wine mixed with water; and he taking them, gives praise and glory to the Father of the universe, through the name of the Son and of the Holy Ghost, and offers thanks at considerable length for our being counted worthy to receive these things at His hands. And when he has concluded the prayers and thanksgivings, all the people present express their assent by saying Amen. This word Amen answers in the Hebrew language to γένοιτο [so be it]. And when the president has given thanks, and all the people have expressed their assent, those who are called by us deacons give to each of those present to partake of the bread and wine mixed with water over which the thanksgiving was pronounced, and to those who are absent they carry away a portion.

Justin Martyr
First Apology
Chapter LXV

Paul and the saints pray for us

You are initiated into the mysteries of the Gospel with Paul, the holy, the martyred, inasmuch as he was “a chosen vessel;” at whose feet may I be found, and at the feet of the rest of the saints, when I shall attain to Jesus Christ, who is always mindful of you in His prayers.

Ignatius of Antioch
Epistle to the Ephesians
Chapter XII

Prayers to God and the Saints

Let us then also pray for those who have fallen into any sin, that meekness and humility may be given to them, so that they may submit, not unto us, but to the will of God. For in this way they shall secure a fruitful and perfect remembrance from us, with sympathy for them, both in our prayers to God and our mention of them to the saints.

Clement of Rome
First Epistle to the Corinthians
Chapter LVI

Proper Worship is Orderly and Regular

These things therefore being manifest to us, and since we look into the depths of divine knowledge, it behoves us to do all things in their proper order, which the Lord has commanded us to perform at stated times. He has enjoined offerings to be presented and service to be performed to Him, and that not thoughtlessly or irregularly, but at the appointed times and hours.

Clement of Rome
First Epistle to the Corinthians
Chapter XL