> The particle of light, photon, for instance, is too heavy, too > massive, too weighty to be linked up with the Sankhya > description. You try to hold it in your palm and you feel > its weight pressing it down Mass is decided by energy and momentum. Its worth a try to see if and how all this fits. Richard Feynman called it the "pleasure of finding things out". Sankhya or some other theory can provide an equivalent explanation for particle physics, although it may not fit perfectly. Each can gain from the other in integral fashion :-) Akasha : Fields in QFT. Vayu : Boson Agni : Radioactive decay, etc Apas : (this is the one I don't understand) Prithvi : Fermions I came across this book Fundamentals of Visistadvaita Vedanta by Srinivasa Chari which offers another theory which is different from Sankhya. It is based on the work of Ramanuja. It describes some theories called panchikarana and trikarana to combine the five Tattwas. It also references the Chandogya Upanishad. Pg 322 of this book http://books.google.com/books?id=un1i5icdpdoC&pg=PA322&lpg=PA322&dq=agni+jala&source=bl&ots=bEL1qvqHB4&sig=zKGZlAeGdAk0aqGU5If_DsAzpbs&hl=en&sa=X&oi=book_result&resnum=2&ct=result#PPA322,M1