People with a scarcity mentality tend to see everything in terms of win-lose. There is only so much; and if someone else has it, that means there will be less for me. The more principle-centered we become, the more we develop an abundance mentality, the more we are genuinely happy for the successes, well-being, achievements, recognition, and good fortune of other people. We believe their success adds to...rather than detracts from...our lives.

Stephen R. Covey
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7 Habits of Highly Resilient People