This is not a new concept. People have been saying this for centuries. What you think about is what determines your reality. There are soothsayers and psychics and scientists that will all tell you the same thing for their own reasons.
You have to manifest your destiny. You have to see what you want in your minds eye in order to create the life you want in reality. You have to make a vision board. You have to 
meditate daily. You have to journal. You have to create the right vibrational frequency. There is all kinds of advice out there for what you HAVE to do in order to create the life that you desire.
Then there are the skeptics. The you just have to work hard. You have to set goals. You have to get an education. You can’t just dream about things and make them happen. You have to be willing to get your hands dirty.
All I have to say is, they’re right. All of them.
You have to decide what you want. You have to decide how you want to achieve your goal. You have to have a clear picture of what your dream is. You have to stay focused on said dream through all other distraction. Then you have to set goals, work hard and get your hands dirty.
Tony Robbins has a bit in his speeches in which he tells everyone to look around the room and notice everything that is the color brown. Then he tells them to close their eyes and picture everything that’s green. Well, they have no idea. They weren’t looking for green things. How are they supposed to know?
It’s the same thing in life. If you decide that you want to be a kick ass Real Estate agent, and you aren’t going to stop until you are making millions and at the top of your field. Unless you start off with your daddy giving you millions and the banks funding your every move, you are going to have to hustle. You are going to have to live breath and sleep Real Estate. But here’s the thing, when you really decide that this is your focus it
becomes easy. Suddenly you’re noticing people all around you talking about selling their houses. You’ll notice the “for sale by owner” signs. You’ll overhear people talking about how they can’t find that perfect ranch with 4 bedrooms and a Jacuzzi in the back.
Your brain picks up on what you want it to pick up on. If you decide that you want the perfect relationship and you really think about what the perfect relationship means to you. What it is.. and more importantly, what it is not. You will start to notice the red flags and beacons every where. You’ll notice when you’re on a date that the man pays a little too much attention to his phone, or the TV over your head. You’ll notice that men that are driven in their careers aren’t usually the ones out at the bars on a Tuesday night. If you want kids you’ll notice that when your interest is around their nephew he barely gives him a second glance.
People are creatures of habit. You have to learn to form the right habits to get what you want to achieve. If you want to lose weight and all you focus on is how much you miss chocolate.. that’s not going to help you. If you decide that you want an active and fit lifestyle and not just to loose weight you’ll start noticing all the outdoor activities there are in your community and how much fun the new “pound” sensation is then you’re more apt to reach your target and stay there.
You have to make the decision. You have to fully commit to change. You have to re-train your brain to take on new habits and new opportunities. Your brain wants to stay complacent. Your brain wants to be happy doing what it’s always done. If you really want to succeed. If you really want to change your life.. you have to actually become what you’re envisioning. Not just hope for the best. Not just try a few things. You have to be the change.
