I woke up this morning feeling somewhat nostalgic for the Churchillian language of the late 30's and early 40's. Which was odd, as I wasn't around back then and, thankfully, we are not at war.
That to one side, I was intrigued to find out more about Keep Calm and Carry On - see below.
I rather like one of the alternatives - 'Your Courage, Your Cheerfulness, Your Resolution; Will Bring Us Victory.'
The story behind ‘Keep Calm and Carry On’
https://london.ac.uk/about-us/history-university-london/story-behind-keep-calm-and-carry