A couple of years ago, I was at a workshop run by Eddie Soloway.  Eddie is a great photographer based in Santa Fe, New Mexico.  His creative images, mainly of the natural world, always bring a new perspective and the workshop Eddie runs is called "A Natural Eye".

One of Eddie's maxims is the "meter for the magic".  I thought about what he said and decided that it's not just a case of metering for the magic, but that the whole of an image should constructed around the magic. 

I was telling my daughter, Joanna, this when we saw this guy at a pavement cafe in London.  I asked her what would the magic in a photograph of him and she said immediately "his green socks".  I took the shot and then, as she went in close to do the same, the guy moved away.  She saw the magic but wasn't quick enough to capture it.