Books on methodology appear to have
been a popular choice for philosophers wanting to make their fortune.
We have already seen Wolff's Leibnizian take on the topic and also
Lange's more Cartesian version. My previous encounter with Andreas
Rüdiger and his rather outdated book on physics, with a quaint
notion of air, aether and spirit as the fundamental elements, didn't
make me expect much. I was pleasantly surprised to find that Rudiger had some intruiging novelties in store with his approach to
methodology.
Although Rüdiger's two books have
markedly different topics, they both share common enemies. Rudiger's
philosophy is clearly anti-Aristotelian, which wasn't strange at the
beginning of 18th century. What is more, it is also
anti-Cartesian. The best indication of this in methodology is
Rüdiger's denial of any inherent or inborn ideas. Rüdiger is clearly inspired
by Lockean criticism in this respect – different cultures have
different ideas, and thus we can expect none of those ideas to be
inborn. Hence, all ideas – and ultimately, all forms of cognition –
should be such that they can be reduced to sensations: they should be
combinations of sensory ideas, abstractions from them etc.
Rüdiger's Lockean leanings form an
interesting contrast with the work of Lange, the other thus far met Thomasian. As we have seen, Lange attempted to base a pietist
philosophy on the Cartesian fundament of a clear cogito.
Rüdiger shies away from all things Cartesian, because Descartes'
mechanistic tendencies point almost inevitably towards Spinozan
pantheism and perhaps also because it is hard to reconcile Cartesian
scientism with a devout religious outlook. English empiricists, on the other
hand, were not so clearly scientists, and like Hume would do later
for Jacobi, Locke offered Rüdiger a good basis for religious
statements.
Rüdiger's Christian tendencies modify
Lockean philosophy in an interesting manner. On basis of his physical
writings Rüdiger notes that animals in general appear to have inborn
ideas – at least they manage to do things instinctually or without
any training. Rüdiger concludes then that humans should also by
nature have inborn ideas, although experience tells us that they do
not. This discrepancy is conveniently explained by the biblical tale
of fall: humans were supposed to have inborn ideas, but due to their
corrupted state, their connection with these ideas has been sundered.
Another modification of empiricism
concerns the clarity of ideas, which in general should on Rüdiger's
opinion be based on the connection of the ideas with sensations –
the more sensuous content we can give to an idea, the clearer it
will be. Such empiricist criterion of clearness is obviously meant to
weed out confusing philosophical ideas – if it is not clear,
discard it. The only exception is provided by Christian mysteries,
such as trinity, because they apparently point out the inevitable
finity and imperfection of human cognition – they show boundaries humans at least in the present life cannot break.
The idea of boundaries of human
cognition shares some affinities with later Kantian philosophy, and
even more similarities with Kant we can see in Rüdiger's ideas on
mathematics, which I shall investigate next time.