Coach Bob Knight was interviewed for a book on leadership and coaching a few years back and was asked to describe what makes someone successful as his/her profession. Here is a quote that stuck out with me as it's how I run my life and business, not worrying about what others say/care:
"Do what’s right and do what you think you have to do, and don’t worry about what somebody says. That would be about as simply put as my philosophy could be."