Nothing is really complete. That story always needs more context to fully understand, that lesson is inevitably missing something important, that job could always be more polished.
With some things (like painting and decorating), we face the law of diminishing returns: more effort results in less and less improvement. There comes a point where going beyond ‘good enough’ is wasteful.
Other things – presentations and teaching in particular – go beyond diminishing returns to decreasing returns: more content undermines what’s gone before, and reduces the impact you hope to have.
By recognising and accepting the impossibility of completeness – you will never be able to say everything – you free yourself up to focus. Not “What is everything I want people to know?” but “What is enough for today?”
Cut. The. Rest. Out.
Get this right – get clarity, simplicity and focus – and those you’re serving are far more likely to listen, engage and understand. And to come back for the next chapter.