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In a nutshell, the fountain of happiness can be found in how you behave, what you think, and what goals you set every day of your life.

Sonja Lyubomirsky (2007). “The How of Happiness: A New Approach to Getting the Life You Want”, p.65, Penguin
In a nutshell, the fountain of happiness can be found in how you behave, what you think, and what goals you set every day of your life.