In the letter he wrote to Kim he humble brags about having a bigger nuclear arsenal and how terrible he would feel if he had to use it.
https://www.cnn.com/2018/05/24/politics/...index.html
https://www.cnn.com/2018/05/24/politics/...index.html
Quote:You talk about nuclear capabilities, but ours are so massive and powerful that I pray to God they will never have to be used.
"This is Master Obi-Wan Kenobi. I regret to report that both our Jedi Order and the Republic, have fallen with a dark shadow of the Empire rising to take their place. This message is a warning and a reminder for any surviving Jedi. Trust in The Force. Do not return to the Temple... that time has past. And our future is uncertain. We will each be challenged. Our trust. Our faith. Our friendships. But we must persevere. And in time, a new hope will emerge. May the Force be with you, always."