No, only disappointment in myself on those occasions I didn't manage to rise to the occasion as I felt I should've done. I can always see how to do it, and then the challenge is, Can I manage that each and every day?
When friends and lovers die and your world gets quieter; that's when the silence comes closer; that's when next isn't the least bit theoretical or abstract.
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.