I agree that my family has had the greatest influence on my joy in the world. There is a difference, in my opinion, between "joy" and "happiness." To me, being happy is a temporary feeling. Many people easily answer that success in their career makes them happy. Happiness, to me, is a fleeting feeling.
Joy, however, is a deeper emotion that isn't full of feel-good juices, but is a more resonant complacency and contentment that lasts. At the end of my life, I do not imagine I will be celebrating financial or career success. Instead, I plan to be surrounded by the people I love most in the world, which is going to be my family.