Osho defined the ideal man as 'A chaos at ease'. Hinduism often lauds the importance of all Navrasas (nine emotions) vis-a-vis a state of contrived peace. It is harmony that is important and not placidity. Harmony is created through a natural balance of letting oneself live through all types of contradictory emotions. Happiness is one thing, joy is another.
When one lets himself live through happiness as well as unhappiness, anger as well as placidity, in such a way that no trace is left in him after both experiences, then one finds oneself in a state of joy. To me, this harmonizing across opposites is a creative resolution of antagonisms.