" Another study on smiles found that seeing a friend’s happy face has a greater impact on our moods then receiving a five-thousand-dollar raise. Did you know your smile is worth that much? After I read the results of that study I went around the church office smiling at the staff. “There’s your raise,” I said. “And there’s your raise, and there’s your raise.”
Can you believe they told me they preferred cash? Even so, smilers are work-place winners. "

― Joel Osteen , Every Day a Friday: How to Be Happier 7 Days a Week