This book is an inquiry into the motivation for altruistic behavior. It uncovers the condition that prompts or sometimes even compels us to act intentionally for the benefit of others. This condition, the pre-reflective experience of another person as a self-conscious individual just like oneself, finds its origin in the very structure of the mind. The essay is a synthesis of evidence from neuroscience, phenomenology, Eastern philosophy, analytic philosophy of mind, and cognitive psychology. Hence, it is an excellent example of work in applied cognitive science.The book includes a critique of the several main approaches to the explanation of the motivation for altruistic behavior: biological, psychological, and philosophical. The path of the main inquiry produces several innovative proposals in the philosophy of mind in addition to the main conclusion. Included in these are a detailed account of the structure of the human mind, an ontological categorization of mental states, a naturalistic explanation of so-called mystical states, a proposal for the role of consciousness in the downward causation of physical events, a new interpretation of the Buddhist doctrine of no-self and a unique view of the nature of love.