Horatio Parker

That looks interesting, thank you.

But it says more about the affinity of the concepts than if any NT writers/thinkers were knowledgable about Plato.

Platonic concepts such as truth and beauty which are eternal, unchanging and ever-present may have been commonplace at the time to anyone educated to write in Greek, and when we speak of gravity we don't invoke Newton. But are we speculating or not?