But to arrive at a clearer understanding on these matters, we ought first to inquire after this point, whether it is allowable to suppose that they are living and rational beings; then, in the next place, whether their souls came into existence at the same time with their bodies, or seem to be anterior to them; and also whether, after the end of the world, we are to understand that they are to be released from their bodies; and whether, as we cease to live, so they also will cease from illuminating the world. Although this inquiry may seem to be somewhat bold, yet, as we are incited by the desire of ascertaining the truth as far as possible, there seems no absurdity in attempting an investigation of the subject agreeably to the grace of the Holy Spirit. (Book I, Chapter 7, Part 3)

From the core of our being humankind seems "incited by the desire of ascertaining the truth as far as possible."

In the last 5000 years we have learned a great deal. In the last four hundred years, we have learned more than all that came before.

Our learning begins in speculation and is confirmed through observation, experimentation, and measurement. This extends to the spiritual domain as much as any other.