While the mind is the engine for creating reality, its fuel is emotion-energy. As the mind becomes focused on an objective, emotion is the energy that gets it there at a speed determined by its strength. Low intensity emotion brings slower and unrefined results, while high intensity emotion produces quicker and more definitive results. It's the Law.
Emotion is that part of the physiological makeup of humans that involves feeling or sensibility.
If an emotion is negative, such as anger, hate, or revenge, it manifests in physical disturbances internally to the body and externally to the environment through the oneness of all life in the Universe Energy Field. Conversely, positive emotion-energy is healing to all. Offering unconditional love, compassion, and forgiveness intellectually, with an absence of emotional fuel to drive it as if only mouthing the words, has little effect, but genuinely strong emotion for such feelings, can quickly transform the external world, as well as an individuals internal world. Governments rise and fall on emotion-energy. Wars have been won or lost on the basis of how much emotional fuel either side could gather.