The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.

This quote is saying that the world that we live in today is shaped by what we think and believe. If we want to make the world a better place, we need to change how we think about the world and our place in it. Our thoughts and beliefs create the world we live in and if we want to make a positive change, we need to work on our thinking and our beliefs.