Intelligent people see the truth of the world, the universe. If the truth, if it were good, that we lived in a wonderful society with wonderful people in a universe that cared about us, smart people would be so happy. But being smart is merely a conviction of your enlightenment to the awful reality of things. Bravo, you learned about all these awful things you can’t do much to fix, and the reward is to languish in existential dread. Congratulations, you have learned the history of humanity and how our society functions, and your reward is sullen remorse in the unending cacophany of injustice.