The Conquest of Happiness (1930)

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Far from a "platitude" this is a simple, easy, actionable, and reliable way to feel happy. It's not absolutely guaranteed, of course, but consider: Sharing food is recognized, since pre-human times and even cross-species, as kindness. It's the pre-linguistic definition of kindness, and deeply biologically significant. Calories, man. It's physics.

Kindness engenders good feelings.

The word com-pan-ion literally means to share food together.