We are born into this world a blank slate, we are thrust into reality and existence because others have simply made that choice of creation, without serious regard to what you will become. It is not choices or the environment which determines our purpose, it is our awareness. Our awareness of reality more than anything determines the level of free will we possess, and the more aware we are of both ourself and our world, the more control and power we have available to discern between our reactions and our Choices.
Belief, acceptance, and assumption are all learned behaviors which allow us to operate in society. Truth is obtained through ab