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If you wish to prosper, let your customer prosper. When people have learned this lesson, everyone will seek his individual welfare in the general welfare. Then jealousies between man and man, city and city, province and province, nation and nation, will no longer trouble the world.

If you wish to prosper, let your customer prosper. When people have learned this lesson, everyone will seek his individual welfare in the general welfare. Then jealousies between man and man, city and city, province and