The very words tell one this: one cannot draw something away (Latin, abs- away, trahere pull), unless there is something to draw it away from. One cannot unfold something and make it explicit (Latin, ex- out, plicare fold), unless it is already folded. The roots of explicitness lie in the implicit. As Lichtenberg said, ‘Most of our expressions are metaphorical – the philosophy of our forefathers lies hidden in
