Aristotle investigates the "first philosophy," seeking to understand the fundamental principles that govern all of existence. The text moves beyond physical observation to question the nature of substance, potentiality, and the divine intellect that moves the universe without being moved. It addresses the core questions of what it means for something to be, distinguishing between the accidental and the essential. This work remains a cornerstone of ontological inquiry, challenging the reader to grasp the underlying architecture of reality.