Do human beings truly have a free will?

You are the physical extension of a non-physical being―an extension of All That Is that has projected itself into physical reality. 

As this extension, you are tapped into the unlimited source of life force energy, the same energy that created the physical universe in which you have placed yourself, the same energy that is used to create all that you see in your reality.

This energy could not be anything other than neutral because it allows itself to be formed and moulded by your thoughts. As this energy is neutral, and because it is moulded by your thoughts, it does not know the difference between what you want and what you do not want.

Because you have been given free will and you exist in a Universe of free will and choice, this energy, which is the All That Is can only and will only be formed by what you are thinking. 

So when you want to attract something into your life and you do nothing but think of the lack of that thing, then the Universe can do nothing but bring you more of what you are thinking―more lack of the very thing that you say that you want.

John L. Payne, Omni Reveals the Four Principles of Creation, 2001, Findhorn Press, United Kingdom, Chapter 2, Universal Laws, 27-32