Pascal thinks that is base, but it seems to be the way God designed us. We can never know enough arguments to be omniscient, but we can judge fruit. And beauty is fruit. More modern lies I suspect. If beauty points us to salvation and holiness, then beauty points us to truth.
Idolatry can never be truly beautiful.
Non-Christians will dismiss the challenge, but they have to because modernism is so ugly. The more important judgment needs to be made by modern Christians. Compare medievalism to our baptized modernity. This is a key to truth. That is the concern in a discussion of Medieval Protestantism.