before the western church changed the teachings due to the pressure from the barbarians that had rome under their command,it was a triadic god.which means,Jesus,Father and the Holy Spirit.
then they added filioque,which reduced the holy spirit,because it could be called through jesus,thereby decreasing it's importance and ruining the actual faith.
The eastern church on the other hand,kept the actual teachings of the apostoles and those made by their councils(I don't know the word for σύνοδος in english,sorry :P ) throughout the centuries.
Triadic God = Father,Son(jesus) and the Holy Spirit.
everything else is crap :P
what you translate in begotten,μονογενής,means the only one that exists or was born=that by Maria and her parthenogenesis(such a nice greek word :P )
the word μονογενης is a 'complex' word,made by μονος+γενης/γεννηθείς,which can be taken as both existed and born.
Jesus was not produced in his earthly form,through sexual intercourse,but through an angel that gave Mary the Virgin a flower,becuase it was God's wish she brought his Son to the world in that form.
nice,I thought nonGreeks read the translated form,good to see someone knows the original :P
Visible,if you don't understand it tell me and I'll give you a live translation :P