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“He who is not contented with what he has, would not be contented with what he would like to have.”
― Socrates

“You say, 'If I had a little more, I should be very satisfied.' You make a mistake. If you are not content with what you have, you would not be satisfied if it were doubled.”
― Charles Spurgeon

“Be thankful for what you have; you'll end up having more. If you concentrate on what you don't have, you will never, ever have enough.”
― Oprah Winfrey