I Am a Part of Infinity offers the first in-depth exploration of Einstein's spirituality, showing how he drew on a dazzling diversity of thinkers - from Pythagoras to Plato, Schopenhauer to Spinoza, the Upanishads to Mahatma Gandhi - to create a novel system where mysticism met mathematics, reality was revered, and the human mind was honored as a mirror of the infinite. Drawing on little-known conversations, recently published letters, and new archival research, the book reveals what Einstein really believed and why his perspective still matters today.