One idea that has interested me lately is psychology and how it plays into one’s worldview.
1650s, “study of the soul,” from Modern Latin psychologia, probably coined mid-16c. in Germany by Melanchthon from Latinized form of Greek psykhe- “breath, spirit, soul” (see psyche) + logia “study of” (see -logy). Meaning “study of the mind” first recorded 1748, from Christian Wolff’s “Psychologia empirica” (1732); main modern behavioral sense is from early 1890s.
One of the most notable aspects of early modern philosophy is the investigation of the human mind and its faculties. The two responses to Hume – Kant and Reid – dealt with how the human mind worked. Two psychological works before Freud – Stewart’s Elements of the Philosophy of the Human Mind & James Mill’s Analysis of the Phenomena of the Human Mind – were philosophical works.
All Christians engaged in the life of the mind should have a basic understanding of how true psychology works.