Lived experience, not doctrine, is religion's real foundation

James insists that institutions, creeds, and theological systems are secondary phenomena — they exist to transmit and organize insights that originated in someone's direct, personal encounter with what they took to be divine. A church's authority, in his account, is borrowed entirely from the founder's original experience; the institution lives "at second hand" off that source. This leads him to focus his entire study on individual testimony rather than official doctrine, treating a solitary mystic's diary as more revealing of what religion actually is than any catechism. It's a deliberately anti-institutional starting point for someone lecturing on natural theology, and it lets James study Buddhist, Christian, and secular transcendentalist experiences side by side using the same psychological lens. Takeaway: to understand any belief system, look at what its adherents actually experience, not just what they're told to believe.