Entering the Castle is a spiritual guide that draws inspiration from Saint Teresa of Ávila's classic work, The Interior Castle. In this book, Caroline Myss presents a contemporary approach to Teresa's teachings, outlining a journey through seven stages of spiritual development. Each stage, or "mansion," represents a deeper level of self-awareness and connection with the divine. Through prayer, contemplation, and introspection, readers are encouraged to explore their inner selves, confront personal challenges, and ultimately achieve a profound sense of spiritual fulfillment.