Stop worrying about whether or not you're effective. Worry about what is possible for you to do, which is always greater than you imagine.
Archbishop Oscar Romero The New Encyclopedia of Christian Quotations
Categories: capacity achievement worry action

Nothing is unthinkable, nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development.
Lewis Mumford The Forbes Book of Business Quotations
Categories: potential capacity capability self-improvement continuing education growth learning

The man is born with a talent which he has meant to use finds his greatest happiness in using it.
Johann Wolfgang von Goethe Webster's New World Dictionary of Quotations
Categories: talent ability capacity work success happiness joy meaning fulfillment purpose