What is the main conflict in The Doors of Perception, and Heaven and Hell by Aldous Huxley?

The Doors of Perception & Heaven and Hell by Aldous Huxley is a volume containing two essays on the subject of visionary experiences, transcendence, and truth. The work is philosophical in nature and presents many ideas that may seem controversial or difficult to understand. Huxley's experiences and opinions with the subject matter make him an informative author. The main themes of the book are transcendence, utility, thought, and self-awareness.