After babysitting my 4 month old niece this week, I was reminded of the lesson my own kids taught me in their infant and toddler years: we are not ‘ourselves’ when we are tired.  When babies are well rested and fed they are observant, social, joyful, curious; when they are tired, they are restless, agitated, even inconsolable. Toddlers too, when past their limits, become the absolute worst version of themselves – we have all seen midday public meltdowns when naptime has been missed. We adults also become a different version of ourselves when we are tired. I am tired. [...]