“Those who rule the world get so little opportunity to run about and laugh and play in it.”

canular refers to hoaxes, humorous deceptions.
The Paris Review interview (1984)
Context: You know, the Cathars believed that the world was not created by God but by a demon who had stolen a few technological secrets from Him and made this world — which is why it doesn’t work. I don’t share this heresy. I’m too afraid! But I put it in a play called This Extraordinary Brothel, in which the protagonist doesn’t talk at all. There is a revolution, everybody kills everybody else, and he doesn’t understand. But at the very end, he speaks for the first time. He points his finger towards the sky and shakes it at God, saying, “You rogue! You little rogue!” and he bursts out laughing. He understands that the world is an enormous farce, a canular played by God against man, and that he has to play God’s game and laugh about it.

"Entertainment or Education? (1936)
Context: The theater-goer in conventional dramatic theater says: Yes, I've felt that way, too. That's the way I am. That's life. That's the way it will always be. The suffering of this or that person grips me because there is no escape for him. That's great art — Everything is self-evident. I am made to cry with those who cry, and laugh with those who laugh. But the theater-goer in the epic theater says: I would never have thought that. You can't do that. That's very strange, practically unbelievable. That has to stop. The suffering of this or that person grips me because there is an escape for him. That's great art — nothing is self-evident. I am made to laugh about those who cry, and cry about those who laugh.

Source: I Had a Hammer : The Hank Aaron Story (1990), Ch. 1

http://www.eluniversal.com.mx/notas/560409.html

Source: The Demolished Man (1953), Chapter 6 (p. 84).

Source: Letters & Autobiographical Writings (1954), p. 185.

Personality Lectures