This volume revolutionized my understanding of mathematical thought. Following the development of symbols walked me through our primal, unstructured mental evolution of grasping intangible concepts that nevertheless apply to everyday reality, through the human context which fostered their understanding. Connected me to the great abstractions of communication. An incredible way to encounter mathematics, revealing a deep level of global research and reference. For instance, I now credit Virahanka for the golden ratio number addition sequence! And I also credit Joseph Mazur for the insightful education presented here.