For the future, I would suggest avoiding subjects of too vast a scale. It would be useful to make out a list of fundamental questions on the matter to be dealt with, and discuss only those.
“It is also a good rule not to put overmuch confidence in the observational results that are put forward until they are confirmed by theory.”
“That's the main reason I gave up my career after John was born and I was pregnant with Andrew. I could not handle going away day after day. The thought of going away before they got up and coming back after they were in bed was intolerable.”