Philosophy begins in wonder. And, at the end, when philosophic thought has done its best, the wonder remains.

Whitehead links philosophy to an originating mood of astonishment at existence—an idea with classical roots (e.g., Plato and Aristotle) but given a modern twist. Wonder is not merely a childish ignorance to be outgrown; it is the enduring residue of serious inquiry. Even when philosophical analysis clarifies concepts and exposes assumptions, it cannot exhaust the strangeness and depth of reality. The line suggests a humility about the limits of system-building: thought can refine our questions and deepen our understanding, yet the world remains more than our explanations. Philosophy, for Whitehead, thus sustains a disciplined openness—an intellectual adventure whose success is measured not by finality but by a heightened sense of mystery.