Didn't get a chance to read this post until after the voting period expired; so I'm voting on the above comment instead.
Although I am not in agreement with everything in the post, I am a firm believer in the power of positive self-talk and appreciate you calling attention to that fact:
It seems simple, it's about the emotion you choose to create and experience in your heart. You choose the emotion, and the body reflects it through the chemistry of that emotion. Let's take control of the communication between the heart and the brain. We decide what the heart tells the brain. We do this by invoking a feeling, a very precise feeling. I invite you to feel in your heart feelings like appreciation for anything or anyone, gratitude for anything and everyone, care, compassion. Researchers have found that these four words, no matter which one you choose, tend to trigger the optimal signal between mind and brain in most people. It's called coherence. (emphasis added)
A citation for your claim about what "researchers have found ..." would be nice.
RE: The Brain and Heart Connection As You Need It - An Article Meant To Help