A question for those familiar with jhanas. How would physical discomfort affect your ability to meditate? What if you had a headache? What if you had brainfog because of lack of sleep?
> How would physical discomfort affect your ability to meditate
It doesn't really. Unless you're in total agony, it's just another thing in the stew. Jon-Kabat Zinn might be of some interest. IIRC, much of the work he was doing around Full Catastrophe Living had to do with pain management.
> What if you had brainfog because of lack of sleep?
You'll probably fall asleep. Which is okay because you needed it.