Until the early 1980s most believed that infants were born with their entire complement of neurons. We now know that neurogenesis occurs throughout our lives. This means that within limits we have the ability to change what we are capable of accomplishing throughout our lives. This is one reason that early mental models can keep us stuck in place. We fool ourselves into believing that changes in the content (different experiences) of our lives represent changes in the underlying structure (unconscious mental models) and function of our lives. Pursuing self-knowledge and building new brain circuits are two sides of the same coin, and both require that we take on the reptilian brain which is firmly allied with keeping things as they are, even at the cost of never experiencing more than a fraction of our potential.