Thomas and Aristotle says that wisdom is
knowing first causes. There are different kinds of first causes, like Material Cause, Formal Cause, Efficient Cause, and Final Cause. Each of those have proximate and remote causes, the latter of which are more “first.” But really,
all these causes come from the foremost first cause, which is God. Understanding natural theology, therefore, is therefore the ultimate end of philosophy. You could also say
Metaphysics is the ultimate end as well, as Being is the foremost principle of everything. Anything that is a being, however, comes from God. Natural theology, it is often put, is a subset of special metaphysics. Now, you could also expand the meaning of philosophy from just natural wisdom to all wisdom. Divine revelation is a wisdom that gives us more possible knowledge of God, and that studying such knowledge can be done by philosophy as well (taken in philosophy’s broader sense). Natural wisdom, additionally, assists in understanding supernatural wisdom. So, you could say that not only
natural theology is the end of philosophy, but theology in general, whether it’s natural and/or supernatural. God. It’s God. That’s what it’s all about.
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