There are things unknown to us but known to others. We navigate through these unknown spheres with our cultural instruments. We use our libraries, technologies, mechanisms and social contacts to enrich our knowledge. But there is still something unknown left.
The is a further sphere of unknown. It stays hidden, the unknown unknown is unknowable. Only you can experience it. It is not shareable by culture only through the challenge of adventuring on its own. This is the nothingness of being in the world.
Walking through the unknown brings life forward. Discovering the mysteries of the unknown of being expands our knowledge. Understanding the limits of our experiences means reaching for the unknown. Challenging the unknown brings us forward in life.