The document explores the flaws of current mathematics education, criticizes the rigid curriculum, and advocates for a more creative and intuitive approach to teaching mathematics.
What you don’t want to happen is unsustainable stress, or for people to not share failure or tell you when you’re wrong. So you need to actively fight this as the leader by: a) asking for dissent (“does everyone agree this is the right path? Does anyone disagree”? and letting a silence hang until someone speaks) b) reward debate.
To the extent that we can give a brief answer to the question of where novel ideas come from, it's curiosity. That's what people are usually feeling before having them.