This chapter explores the philosophy of thinking, challenging René Descartes’ famous argument “I think, therefore I am” by suggesting that “I am, therefore I think” might be equally plausible. It discusses different types of thinking: body thinking, image thinking, and concept thinking, emphasizing that all are crucial for human cognition and survival. The chapter critiques the traditional emphasis on logical thinking over image thinking and highlights the importance of sensory experiences in forming thoughts. It also introduces the idea of body thinking, where the body processes information and makes judgments without the brain’s involvement. The chapter concludes by advocating for a balanced approach to understanding human thinking, recognizing the contributions of all types of thinking to human knowledge and innovation.