“Many people advise you to do only what you love to do, asserting that any other route will lead to a miserable life. Helen Keller thought differently and wrote, ‘Many persons have a wrong idea of what constitutes true happiness. It is not attained through self-gratification but through fidelity to a worthy purpose.'”71
Sanders, Tim (2011-03-29). Today We Are Rich (p. 236). Tyndale House Publishers. Kindle Edition.