This quote is a profound reflection on the progression of human understanding and knowledge. It suggests that before we can calculate, or engage in logical, scientific, or rational thinking, we first have to create a framework or narrative – essentially, a fiction. This fiction serves as a preliminary understanding of the world, a narrative that helps us make sense of our surroundings and experiences.

Nietzsche’s idea of fiction is not a lie or an illusion, but rather a necessary simplification of the world. It is a model or a map that we create to navigate the complexity of reality. Once we have this model, we can then refine it, challenge it, and ultimately, calculate or reason within it.

This quote can be applied to various aspects of today’s world. In science, for instance, we create models or hypotheses (fictions) which we then test and refine through experiments (calculations). In politics, we create ideologies or narratives that guide our actions and policies. Even in our personal lives, we often create narratives about who we are and what our lives mean, and these narratives guide our decisions and actions.

In terms of personal development, this quote suggests that it’s okay, and even necessary, to start with a “fiction” or a simplified understanding of ourselves and the world. This can be a vision of who we want to be, or a narrative about what our lives are about. The important thing is not to get stuck in this fiction, but to continually refine it, challenge it, and expand it through experiences, learning, and reflection. This process of creating and refining our personal narratives can lead to a deeper understanding of ourselves and a more purposeful and fulfilling life.