“The secret of happiness at work is contained in one word; excellence. To know how to do something well is to enjoy it.” Pearl S. Buck By E-MotivasyonPersonal Development Quotes, Motivational Quotes, Happiness Quotes0 comments ▶Dr. Tayfun Topaloğlu Youtube Instagram: @drtayfuntopaloglu “The secret of happiness at work is contained in one word; excellence. To know how to do something well is to enjoy it.” Pearl S. Buck