Only the highway of useful service leads to the city of happiness.
Psychologists who study human behavior have concluded that we are happiest when we are striving to achieve success. It is the act of striving, not the successful completion of the task, that provides the greatest psychic rewards. When you strive to achieve success through service to others, you multiply the benefits to yourself, and you ensure that whatever road you choose in life will ultimately lead you to success and happiness. There is no occupation or profession that will not benefit from a concerted effort to better serve others. But the greatest benefit will be to you, in the form of the self-satisfaction that comes from knowing that you made a difference, that without you others would never have received the service you provided.