Knowledge is happiness, because to have knowledge - broad, deep knowledge - is to know true ends from false, and lofty things from low.
The main thing needed to make men happy is intelligence.
Nature holds the key to our aesthetic, intellectual, cognitive and even spiritual satisfaction.
Memory is satisfied desire.
If I couldn't use food or love to define contentment, I would use reading.
And feeling clever, I've always thought, is just a sigh away from being cheerful.
The pleasures arising from thinking and learning will make us think and learn all the more. 1153a 23
...a mind, if given only the best food never craves any other.
The monkeys solved the puzzle simply because they found it gratifying to solve puzzles. They enjoyed it. The joy of the task was its own reward.
A man is never more satisfied than when he is confirming a favorite theory.
Memory is like all other human powers, with which no man can be satisfied who measures them by what he can conceive, or by what he can desire.
Mere mental, that is, intellectual labour, is for the soul and has its own satisfaction.
I think that we're pattern-seeking animals, and what we like best is a story where everything fits together, where there's no puzzle pieces left over.
I obtain great satisfaction out of using my intellect.
Delight at having understood a very abstract and obscure system leads most people to believe in the truth of what it demonstrates.
Knowledge is pleasure as well as power.
