The document discusses archetypes, which are universal symbols and characters that appear across different stories and cultures. There are three main types of archetypes: character archetypes like the hero and mentor, plot archetypes like the journey and initiation, and symbol archetypes such as colors, numbers, and natural elements that convey deep symbolic meanings. Archetypes are timeless symbols that have remained largely unchanged and can be found in stories from ancient myths to modern works because they represent common human experiences.