Book excerpt: In The Proper Study of Religion, Sam Gill charts an innovative course of development for the academic study of religion by engaging the legacy of Jonathan Z. Smith, Gill's teacher and mentor for fifty years. Building on Smith's foundational legacy through creative encounters, Gill explores an extensive range of absorbing topics including: comparison as essential to academic technique and to human knowledge itself; play, philosophically understood, as a core dynamic of Smith's entire program; the relationship of academic document-based studies to the sensory-rich real world of religions; and self-moving as providing a biological and philosophical foundation on which to develop and expand upon a proper academic study of religion.