Seeing but not really observing what's going on in the organization.
Nearly all of Behn's public management essays are good -- although supposedly aimed at the government sector, I can't think of a single non-governmental nonprofit that would not benefit greatly by having all its board and senior staff read and discuss one of his essays every month. Or share them all and do a retreat where different board members summarize the ideas and discuss how they could be applied within their own organization.