Sonja Lyubomirsky

“Happiness has controllable inputs.”

The book separates circumstances from intentional activities, giving readers practical leverage.

“Fit beats prescription.”

The best activity is the one that matches your personality, values, and current life.

“Variety prevents adaptation.”

Practices lose power when they become numb routines; changing format keeps attention alive.

“Gratitude needs specificity.”

Real gratitude names the event, why it happened, and why it matters.

“Kindness strengthens connection.”

Helpful action can lift mood when it is freely chosen and concrete.

“Goals need personal meaning.”

Self-concordant goals are more nourishing than goals borrowed from status pressure.

“Savoring trains attention.”

Pleasure can be extended by deliberately staying with it instead of rushing past.