3. This Art is useful in the highest degree and has many valuable
features.
First, it is useful on account of its general and transcendental
character because its principles belong to the highest order of
generality and are true, necessary and primordial (as has been
shown) and the principles of other sciences can be tested with
them.
Thus, the Art is a way to gain access to any faculty of study, and
not only in speculative areas such as theoretical physics,
mathematics, metaphysics and theology, but also in the fields of
psychology, the moral sciences, linguistics, mechanics as well as
medicine, canon law and civil law.
4. And there is nothing out of bounds for this Art in which all things
are seen to emanate from one source; it is most useful as a very
bright light that the intellect can use to destroy its enemy, namely
ignorance.
It is most useful to you as a learning tool because it comprehends
many things in a small number of loci without any instability and
while you discourse with it, all things fall into place in its loci where
they can be readily retrieved by your memory.
And it is extremely useful because it is lofty and profound when it
discourses in the most lofty and profound way about God and all the
articles of faith while proving them to be true.
5.
6. And finally, it is most useful because by applying it you can learn
more in one year than anyone could ordinarily expect to learn in
twelve years, as many have experienced, and it is worth infinitely
more than gold as it provides broad and ample access to acquiring
perfect science in a short time to those who put it to use, as you
can see when you consider its layout and discourse.
