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Optimistic, happiness or positive thinking inspire other people happy, emotional intelligence or balance between happiness and sadness, man holding smile face pendulum ball to hit other sad faces.
Happy employees of solar power plant raise their hands and shout for joy, clapping each other. People are satisfied with result of their work success.
Amateur astronomers looking at the evening skies, observing planets, stars, Moon and other celestial objects with a telescope and camera on a star tracker.
Full length of young Asian man and woman standing with their backs to camera, looking at each other and holding hands against white studio wall. Millennial couple expressing affection

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