Optimism isn't about pretending everything's fine, it's about stubbornly insisting on making things better.
Bernie needs to shore up his weakness with older voters. Maybe show pictures of his grandkids at a speech. Tell long stories that don't go anywhere. Unveil a "universal your grandkids will call you" plan.
In seriousness, maybe he could explain why young people like him so much. Because they're just trying to have a life.
Talk about the younger people whose parents will never have grandkids because of the awful economic conditions they live in.
"He talks revolution for an hour without using any verbs"
Sunbeam City is a anticapitalist, antifascist solarpunk instance that is run collectively.