Aside from this cite which indicates something other than "calmness" (can you sing along a glorious triumph-song calmly?) , is there not another about the wise man WILL cry out while on the rack?
QuoteVS47. I have anticipated thee, Fortune, and I have closed off every one of your devious entrances. And we will not give ourselves up as captives, to thee or to any other circumstance; but when it is time for us to go, spitting contempt on life and on those who cling to it maundering, we will leave from life singing aloud a glorious triumph-song on how nicely we lived.
Here it is from Diogenes Laertius:
QuoteAnd even if the wise man be put on the rack, he is happy. Only the wise man will show gratitude, and will constantly speak well of his friends alike in their presence and their absence. Yet when he is on the rack, then he will cry out and lament.
So there is my explicit license from the texts: When I am on the rack I will not "keep calm and carry on" like nothing significant is happening! ![]()