Rabbi Abraham Isaac Kook (1865-1935) revolutionized Jewish mysticism by crafting a radical synthesis between spiritual transcendence and worldly engagement, yet scholarly analysis of his philosophical innovations remains incomplete. Zvi Yaron's comprehensive study "Mishnato shel HaRav Kook" analyzes Kook's non-halakhic writings, including rare unpublished materials, to explore how Palestine's Chief Rabbi reconciled traditional Judaism with modernity. Where his contemporaries rejected secular movements, Kook discerned divine sparks in all human endeavors—even viewing atheism as a providential force for purging anthropomorphic elements from religious thought. Through critical analysis of Yaron's interpretation, this review reveals both the study's strengths in documenting Kook's practical bridge-building between traditional and secular Judaism, and its limitations in capturing the full theoretical sophistication of his thought. Particularly noteworthy are Yaron's inadequate treatment of Kook's dialectical understanding of atheism's constructive role and his Maimonidean negative theology. While Yaron's work provides valuable access to Kook's writings and practical philosophy, it ultimately falls short of conveying the true originality and depth of one of modern Judaism's most innovative theological minds.