In the Theaetetus, young Theaetetus admits that Socrates’ questions make him dizzy with amazement. Socrates is delighted: that dizziness is the mark of a true philosopher. Aristotle agreed in his Metaphysics, writing that people first began to philosophise because of wonder. Wonder is the moment the familiar becomes strange - when we stop taking time, mind, justice or existence for granted and ask what they really are. It is not confusion or ignorance but an openness that refuses easy answers. Children have it naturally; adults often lose it under routine. Philosophy, at its best, is the art of never quite getting over the astonishment of being here.