"To be successful, you have to have your heart in your business and your business in your heart."

This quote is really about caring so much about what you do that it becomes more than just a job. “Heart in your business” means you show up with genuine interest, effort, and pride. You’re not just clocking in; you actually want to do things well. “Business in your heart” flips it: your work matters enough to you that you carry it with you, the way you think about a friend or a passion project.
Think of someone who lights up when they talk about what they’re building, or a teacher who goes the extra mile for their students. That kind of energy can’t be faked. Watson is basically saying: real success happens when your work isn’t only how you make a living, but also a meaningful part of your life.