The insightful part is this:
"What’s a joker? A joker is someone who says they’re going to do something, and then doesn’t. A joker always has excuses. “Oh well, I tried…” -> No, I don’t give a fuck that you tried. Did you do it or not?
DID YOU DO WHAT YOU SAID YOU’D DO OR NOT?
If not, you’re a fucking joker and we’ve got problems."
To summarize: don't talk about it, be about it.