Water is the liquid state of matter which has a flowing, dissolving, carrying and cleansing quality. It is a substance without stability. Fire has the ability to transform solids to liquids to gas and vice versa. It is the power in the body. It is without substance.
Air is the gaseous state of matter whose characteristic is mobility.
It is responsible for all movements. It has no form. Ether is the field in which all the activities take place, from which everything is manifested and into which everything returns. Ether does not have a physical existence but is the space which separates matter. Dosha means that which darkens, soils or causes things to decay.