Sometimes called Dance of Shiva. A vibrating and oscillating body or aggregate has simultaneously both states or conditions of concord and discord. What determines the overall condition of concord or discord is the preponderance of one or the other state. A center may have preponderantly more Harmony than discord or preponderantly more discord than Harmony within its signature or chord of vibration. Which is to say a relationship between the notes or discrete aliquot parts of that chord or signature. These relationships between parts or notes of a chord are governed by rules and laws as are found in music theory such as the definitions of musical note values and intervals and chordal relationships (two or more notes). A word of caution when studying music theory: always focus on music and its relationships in a physics sense and don't get lost in the sensorial pleasing music - music sense. The first is of the Mind and Science while the second is of the Body and is Illusory or fantasy as the musicians well know.
When these states are in balance the vibration signature or chord is said to be in equilibrium wherein an equation of vibratory or oscillatory forces is established. During such an equation of polar force the net result is said to be neutral but should not be considered as having a null or zero value as many like to sum the positive and negative values into a conjugate zero. These two states are ever present even in a null or voided state - they are said to be LATENT or Potential. When not in balance a preponderance exists either syntropic (contracting to center) or entropic (radiating from center).