There are rules no one told you — lessons that only become clear through experience, failure and a few bruises along the way. Here are three truths your mom probably didn't mention, but every entrepreneur eventually learns. Related: 5 Truths About Entrepreneurship You're Better Off Knowing From the Start1. So if you're going to invest in college, don't do it for the framed degree. Related: The 6 Scary Truths About Becoming an EntrepreneurEntrepreneurship is one of the toughest and most rewarding paths you can take.