A Secret to Happiness That I Overlooked -- Until Now.

A significant factor in happiness is the hedonic treadmill, or hedonic adaptation.

People are adaptable. We quickly adjust to a new life circumstance—for better or worse—and consider it normal. Although this helps us when our situation worsens, it means that when circumstances improve, we soon become hardened to new comforts or privileges. Scoring air-conditioning, a bigger house, or a fancy title gives us only a brief boost in happiness before we start to take it for granted. As Aldous...