The Philosophy of Mind is a more recent field that deals with questions of consciousness and how it interacts with the body and the outside world. The Philosophy of Mind asks not only what mental phenomena are and what gives rise to them, but also what relationship they have to the larger physical body and the world around us.
Read Article: Philosophy of Mind: Philosophy of Thought, Perception, Consciousness, Identity
Thinking is a small part of the animal man. The brain is essentially an addict and a hunter. If it finds thoughts that it likes, it keeps self-stimulating (literally mental masturbation). We are constantly bathed in hormones.