"It's simply a fact: when people have goals to guide them, they are happier and achieve more than they would without having them. It's a brain thing. Achieving a goal you've set produces dopamine, a neurotransmitter responsible for feelings of pleasure. Reciprocally, dopamine activates neural circuitry that makes you eager to pursue new challenges.
Goals provide focus. With no guiding vision or plan, people tend to drift. Goals provide a measuring stick for progress. Goals enhance productivity. They bolster self-esteem. And most of all, goals increase commitment, so you're more likely to achieve whatever you set out to conquer."

Of course this also points out the contrary, that there are people without goals. Something that AI researchers may tend to forget from time to time.

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