Dougg,
Not until Constantine in the 4th century did the RCC believe in a trinity. I won't argue that the apostolic fathers like Polycarp, Clement, Ignatius, etc...did not believe Jesus was a god - but attributing to them belief in a trinity is another matter completely.

The New Catholic Encyclopedia notes: "The formulation 'one god in three Persons' was not solidly established, certainly not fully assimilated into Christian life and its profession of faith, prior to the end of the 4th century. . . Among the Apostolic Fathers, there had been nothing even remotely approaching such a mentality or perspective."

The New International Dictionary of New Testament Theology states: "Primitive Christianity did not have an explicit doctrine of the Trinity such as was subsequently elaborated in the creeds."

The Encyclopedia Americana plainly reports: "Fourth Century Trinitarianism did not reflect accurately early Christian teaching regarding the nature of God; it was, on the contrary, a deviation from this teaching."

The Ethnic Trinities by L. L. Paine, page 219, states that the development of the trinity was an evolutionary process. "The Christian dogma did not start from a polytheistic or pantheistic ground, but from Jewish monotheism; but the development from one God to a trinity was just as completely a historical evolution as any other."


LINK

Also, your quote from Martyr/Trypho doesn't prove he believed in a Trinity, only in Jesus' deity. Marcion believed in Jesus' deity too, but he wasn't a trinitarian. I don't see how you can argue Martyr believed in a Trinity.

For more on Justin Martyr, see here beginning in the 1st paragraph:

LINK


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"He who saves one life... it is as if he saves an entire universe. He who destroys a life... it is as if he destroys an entire universe"

TALMUD - Sanhedrin 4:5

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