When we encounter paradox, it should alert us that our categories may be too small for the data we are observing. Paradox is that moment when the way we have understood a thing (up to now) contradicts the way we have understood another thing (up to now). This suggests there may be a way of understanding one or other (or both) things that we have not yet come to realise. We may be hindered in perceiving in this new way due to the imprecision of our capacity for observation... or sometimes our unwillingness to see clearly(?!). John’s prologue is full of paradox!