"It's not about how to achieve your dreams. It's about how to lead your life.  If you lead your life the RIGHT WAY , the karma (good results, destiny, fortune, good luck) will take care of itself. The dreams will come to you." - Dr. Randy Pausch 

I think this means that you need to live your life fun and if you work hard enough good karma will come to you. For example, if you work hard then your dreams will come to you but if you don't have fun then what's the point. And if you have fun then you will learn new lessons in life. And there's a reason why brick walls are there not because they want to stop you but because they want to see how bad you want it.