This quote is saying that when you feel like there’s something missing in your life or you’re not happy, it may be because you’re not doing things that you’re really interested in or that make you excited.
It could be that you don’t have a goal that you really care about, or you’re not using your special talents and working hard towards something that’s really important to you. Think about what you want to do and what makes you feel alive, and then work towards it every day.