It has been clearly demonstrated that the body is vibrational in nature since the very perception of emotions is the perceiving of vibrations and you can feel the vibrations of the world around you constantly streaming through your body throughout each day of your life. Furthermore, it has also been clearly demonstrated that negativity has extremely deleterious effects not only upon your ability to manifest your desires, but also upon your physical well-being as well.
Exposure to vibrations that are not harmonized with the essence of your being are experienced as negative emotions since these vibrations destroy the harmony of the body thereby giving rise to the pain that is associated with negative emotion. Therefore, since the damaging vibrations that give rise to negative emotion have been clearly demonstrated to be extremely detrimental to your physical well-being, along with the well-being of the various manifestations you attempt to create, it is only reasonable to conclude the exact opposite to also be true.
Thus, positivity is extremely beneficial to your well-being and the well-being of the dreams you hope to bring into reality. Ergo, the greater is the degree of your positivity, as is experienced as good feeling positive emotion, the healthier you will become and the more substantial will be the creations you attempt to bring into your reality.