Hello,
The "five elemens" is a good classification to describe the basic forms prakriti manifests at the gross level (which we all percieve through our senses).
But why it is said that these elements (or these differentiations) also exist at the subtle level?
I mean, the deeper/subtler you go, the lesser differences are.
To put it in another words, how can we talk about differentiation between earth, water, air, etc when we are at the level of sub atomics or quarks?
Hope you understand my point.