God created matter and has no personal name

And we have been taught, and are convinced, and do believe, that He accepts those only who imitate the excellences which reside in Him, temperance, and justice, and philanthropy, and as many virtues as are peculiar to a God who is called by no proper name. And we have been taught that He in the beginning did of His goodness, for man’s sake, create all things out of unformed matter; and if men by their works show themselves worthy of this His design, they are deemed worthy, and so we have received—of reigning in company with Him, being delivered from corruption and suffering.

Justin Martyr
First Apology
Chapter X

The Sunday Eucharist replaces the Sabbath

If, therefore, those who were brought up in the ancient order of things have come to the possession of a new hope, no longer observing the Sabbath, but living in the observance of the Lord’s Day, on which also our life has sprung up again by Him and by His death—whom some deny, by which mystery we have obtained faith, and therefore endure, that we may be found the disciples of Jesus Christ, our only Master—how shall we be able to live apart from Him, whose disciples the prophets themselves in the Spirit did wait for Him as their Teacher? And therefore He whom they rightly waited for, being come, raised them from the dead.

Ignatius of Antioch
Epistle to the Magnesians
Chapter IX

Christ is the only one worshipped

… It is neither possible for us ever to forsake Christ, who suffered for the salvation of such as shall be saved throughout the whole world (the blameless one for sinners), nor to worship any other. For Him indeed, as being the Son of God, we adore; but the martyrs, as disciples and followers of the Lord, we worthily love on account of their extraordinary affection towards their own King and Master, of whom may we also be made companions and fellow-disciples!

Martyrdom of Polycarp
Chapter XVII

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