Law of attraction practiced prior to the 1800s. If you are referring to arcane practices in Babylon and Biblical times that we have little knowledge of, I am aware and have looked at these. If there are some specific and relevant references I would be interested in hearing them. As you believe in a LOA, most of what you hear will be filtered through this lens. As I now do not, most of what I hear will be seen through that lens.
Most people don’t consider using the Law of Attraction to bring better health into their lives, but as you noticed in the results of the aging experiment, it’s actually a great tool for that purpose. Because the Law of Attraction works with thoughts and thoughts affect our physical reality, you may be attracting poor health into your life right now without even realizing it.
After you’ve set your powerful intentions, designed all of your desires with pinpointed specificity and then heightened your vibration with your thoughts and feelings, you then need to let go of your expectations. This can be the trickiest part of the manifesting process because you need to get out of your own way. Too often people sabotage themselves at the point where they just need to trust. The best affirmation to use?