Thomas Aquinas, as much as I admire his work and efforts, is no more authority to be respected than Black Elk.
what renders someone authoritative is they can argue their point reasonably and rationally. Aquinas is not an 'authority' because he is a saint or a Catholic, but because he is an exemplar of the Aristotelian model of debate that underpins Western Philosophy and is regarded as a benchmark in secular circles on that very point.
Aquinas' own 'authorities' were Aristotle, Avicenna, Averroes as well as his Catholic predecessors.
The point is, if you want to ask a question of why Catholics think 'X', you can't do better than ask Aquinas, in the same way that if you want to know why the Native American thought 'X', don't ask Aquinas, as Black Elk, or whoever.
Imagine you were on trial for your beliefs, and you are seeking a defence lawyer. D'you ask the bloke down the pub, who's got an opinion on everything, or do you ask someone who is experienced in the Law?
Same here. if you want to know about Catholic Spirituality, or Native American Spirituality, or Shamanic Spirituality ... seek put someone who knows what they're talking about, avoid the bloke down the pub — just cos he shouts down all opposition, and has an opinion on everything, that doesn't make him an expert.
I'm trying to remember the name of one of the foremost authorities on Aquinas — he was mentioned at a lecture — because he's an athiest. When asked, apparently he said, "I think no-one argues a point better that Aquinas, but I just don't have is faith."
What concerns me is that the discussions will become limited to Catholic "authorities," maybe the inclusion of one or two Protestant "authorities" to argue against and make the Catholics come out smelling like roses, and everybody else is damned anyway so how can they possibly be authorities? I truly hope my concerns are unfounded.
No, I think they are founded, but misdirected.
It's not my point to come out smelling like roses, it's my point to argue that what I believe is reasonable and logical. If anyone says that Catholicism is wrong in what it believes, that's unreasonable and illogical.
Doesn't mean everyone or anyone else is damned, or that they are not authorities for their own calling.
Thomas