There is a story – David Foster Wallace among others has told it – of a big fish swimming along in a river and encountering two small fish coming the other way. ‘How do you like the water, boys?’ the big fish says to the two little fish. They don’t reply but, as they swim away, he hears one saying to the other: ‘What’s water?’ That story can be applied, at the highest level, to the God who, as St Paul told the first century Athenians, is the one ‘in whom we live and move and have our being’ (Acts 17,28) and might serve as a timely parable for our forgetfully agnostic times. At a quite other, very much more mundane, level, it might speak to our current situation as unwitting inhabitants of a communications bubble, the implications of which we hardly understand at all. Some of the lead pieces in this issue of Studies are concerned with this notionally familiar and increasingly influential feature of contemporary life.