But there is also another sense in which seeing comes before words. It is seeing which establishes our place in the surrounding world; we explain that world with words, but words can never undo the fact that we are surrounded by it. The relation between what we see and what we know is never settled. Each evening we see the sun set. We know that the earth is turning away from it. Yet the knowledge, the explanation, never quite fits the sight. The Surrealist painter Magritte commented on this always-present gap between words and seeing in a painting called The Key of Dreams.
The way we see things is affected by what we know or what we believe. In the Middle Ages when men believed in the physical existence of Hell the sight of fire must have meant something different from what it means today. Nevertheless their idea of Hell owed a lot to the sight of fire consuming and the ashes remaining - as well as to their experience of the pain of burns.


