"...thought is a very subtle set of reflexes which is potentially unlimited; you can add more and more and you can modify your reflexes. Suppose like a logician you say: 'All swans are white. This bird is a wan therefore this bird is white.' But then you modify this by saying, 'I've seen that some swans may not be white.' And so on. Even the whole logical process, once it's committed to memory, becomes a set of reflexes. There may be a perception of reason beyond the reflexes, but anything perceived becomes sooner or later a set of reflexes. And what's what I want to call 'thought' – which includes the emotion, the bodily state, the physical reaction and everything else."