A single volume purporting to contain comprehensive knowledge on all subjects and facets of existence is generally understood to be a conceptual, and likely unattainable, goal. Such an undertaking would attempt to encapsulate philosophy, science, history, and the arts within a single binding. The sheer scope and complexity involved make its literal realization implausible.
The value of such an idea lies in its aspiration toward holistic understanding. It speaks to the human desire to connect disparate fields of knowledge and find overarching principles. Historically, encyclopedic works have served as attempts to consolidate existing learning, but the ambition to reveal fundamental truths transcends mere compilation. Its significance lies in its implied promise of enlightenment and comprehensive perspective.