Introspection has such an interesting history in philosophy. Plato's whole Form scheme is somehow dependent on it. John Calvin has one of my favorite takes in the first few chapters of his institutes where introspection inherintly forces us to look outward and then returns toward introspection. Here's the first part of CHAPTER 1.
"Our wisdom, in so far as it ought to be deemed true and solid Wisdom, consists almost entirely of two parts: the knowledge of God and of ourselves. But as these are connected together by many ties, it is not easy to determine which of the two precedes and gives birth to the other. For, in the first place, no man can survey himself without forthwith turning his thoughts towards the God in whom he lives and moves; because it is perfectly obvious, that the endowments which we possess cannot possibly be from ourselves; nay, that our very being is nothing else than subsistence in God alone."
