In 1959 Unity first published Charles Fillmore's The Revealing Word. For the law of attraction he wrote: “The law that all conditions and circumstances in (our) affairs and body are attracted to us in accord with the thoughts we hold steadily in consciousness.”
So how is this attraction possible?
It's based on the fact that everything in the universe is energy. We are mass energy. Yes, we have a body and yes, we are spirit, and all of that is energy in different forms. We send energy forth from our consciousness that is directed by our thoughts, our words, and our actions.