Hypnagogia–a fancy Greek word for the transition from wakefulness to sleep–is a state of consciousness in which trippy mental phenomena like lucid dreaming, hallucinations, and sleep paralysis occur. It’s a state that artists and scientists through the ages have famously mined for ideas–Beethoven, Salvador Dalí, Thomas Edison, Nikola Tesla and Isaac Newton all credited hypnagogia with enhancing their creativity. Opus Hypnagogia: Sacred Spaces of the Visionary and...