Psychologists call this habituation, economists call it declining marginal utility, and the rest of us call it marriage.

Impact is rewarding. Mattering makes us happy.

People are happiest when they're trying to achieve goals that are difficult but not out of reach.

Humans react to danger when it is immediate, immoral, visible... Global warming does not press any of those buttons.

My friends tell me that I have a tendency to point out problems without offering solutions, but they never tell me what I should do about it.

The brain and the eye may have a contractual relationship in which the brain has agreed to believe what the eye sees, but in return the eye has agreed to look for what the brain wants.

Our brain accepts what the eyes see and our eye looks for whatever our brain wants.