Brian Fisher says it’s crucial to know your strong personal “why.” You must know why you want to be successful and why you want to be an entrepreneur because it serves as the foundation for everything you want to do in life. If you build a house on sand, it’s not going to weather the storm, but if you build your house on a solid foundation, you can put up with a lot of storms, critics and naysayers, and the challenges and adversities you’re going to face.