Out of the [Five-Elements](http://en.wikipedia.org/wiki/Classical_element#Classical_elements_in_Hinduism) only akasha is the one I am unable to understand till now. How is it related to the earth or a material body? Though we know it's different from **air** and recedes into outer space, how is it possible to add akasha as an element which forms our body?

How do I explain this to a scholar and explain its significance?