Seeing is shaped by learned assumptions, not pure perception

Berger opens by arguing that the way we look at anything, including art, is never a simple, unmediated visual act; it's structured by prior knowledge, cultural context, and assumptions we've absorbed so thoroughly we no longer notice them as assumptions at all.

He illustrates this by showing how the same painting means something different depending on where and how it's encountered — reproduced in a textbook alongside scholarly captions, hung in a museum surrounded by other treasured objects, or used as a backdrop in a film — because the surrounding context actively reshapes what we perceive, not just what we think about what we perceive.

This opening claim sets up the book's larger project: since seeing is never innocent, examining the hidden assumptions embedded in how we're taught to look at art becomes necessary for understanding what images actually communicate, beyond their surface subject matter. Takeaway: how and where you encounter an image actively changes what you see in it, not just what you think about it afterward.