I love history, and feel it is routinely undervalued and underutilised. We have a 'cult of modernity' or tendency to stress what is more recent, that is very stultifying. A lot of so-called modern thought is merely the rehashed arguments of the ancients. The Greco-Roman philosophies had almost 1000 years where iterations of almost every idea extent today was proposed.
With Christian doctrine, this is even more so: If people come with New Agey transcendant Cosmic Christs and such stuff, just read what the Church Fathers said against Gnosticism. If Buddhist teachings, Augustine spoke against Gymnosophists of India and a lot that was said on Stoicism is relevant here. If Materialism and Atheism, the ancient arguments against Epicurianism is there to be explored and utilised. The list goes on.
The things modern heretics or opponents of Christianity are saying, aren't new. The claptrap of Jesus being a 'great teacher but not God' was already said by Porphyry centuries ago. Celsus wrote on the impossibility of the Virgin Birth. The JW are basically Arians. People aren't original, and their arguments for Atheism or against Christianity is no stronger today than in Roman times.
There is a rich treasure trove of wise and educated Christians that already considered and rejected these arguments. For some reason we ignore it, because we think the moderns know more for some reason? It is all very silly. As CS Lewis said, one must read two old books for every new one, for we seldom see our errors while making them. Only with the fresh breeze of history, do we notice their mistakes and by juxtaposition realise we may be wrong ourselves. Great thinkers laboured over Christian thought for millenia, and it is utter hubris not to stand on the shoulders of these giants.