Individuals can only perceive the world through their own experiences and emotions.
In other words, objectivity does not truly exist; it is merely assumed.
The world is, after all, a world as seen from an individual perspective.
Therefore, there is a world for each person.
However, that is a world as seen by a person, not the world as it truly is.
We know nothing about the world.
↓ Nietzsche is discussed here.