A few weeks ago, amidst the controversy over Gove's changes to the texts to be studied at GCSE, this cartoon by Tom Gauld did the rounds on twitter. The more I think about it the more I think it helps 'show' what we mean by 'show, don't tell':
(Credit: http://www.casualoptimist.com/blog/2014/06/18/the-set-text/)
By the end of this cartoon the reader feels genuine emotion for the book. Despite its relentless positivity the progression shows the reader that whoever the book is talking to is not as excited by the prospect of reading it as it is of being read. We can interpret that the book is about to be hugely disappointed and we empathise. But, at no point have we been told how the book feels about what is happening - we've worked it out for ourselves, put ourselves in the book's position and, as a result, felt far more than we would if the cartoonist had told us more fully what was happening.