This was a statement made by Henry Ford many years ago. He was a wise man who was extremely successful and some of his thoughts and writings are quite profound. When you think about it we all know if we reflect on our lives that what we believe is true and possible for us will come to be and the things we think and believe are impossible truly are impossible.
We all have heard so much about positive thinking and how important that is in our lives but we don't often reflect on how we actually manifest things. Einsteins theory of relativity stated that things are all energy that condense into somethingness and evaporate into nothingness. As I look around my room I notice that everything was thought first. The furniture, the carpet, the house and the yard were all thought first before they become reality. Your brain or thoughts are what creates that reality and if you think that you can you will. If you think you can't then it willl be very difficult.