Teaching happiness can be -- and often is -- at odds with teaching epistemic rationality.
It can also help with epistemic rationality if you teach people to identify distorted thinking via the CBT framework as layed out in David Burns "The Feeling Good Handbook".
Effectively dealing with one's own emotions helps with clear thinking.
On the other hand when you try to get school teacher to do something right it's quite possible that they mess up and at the end you have less epistemic rationality.
“Happiness in intelligent people is the rarest thing I know.” ― Ernest Hemingway, The Garden of Eden see here
Did you know The surprising downsides of being clever? Is Happiness And Intelligence: Rare Combination? There are longitudinal studies which seem to imply this: Being Labeled as Gifted, Self-appraisal, and Psychological Well-being: A Life Span Developmental Perspective
I found these via slashdot.
As LessWrong is harbor to unusually high-IQ people (see section B in here). I wonder how happiness compares to the mean. What are your thoughts.