4 qualities of matter:
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Hardness
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Cohesion
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Heat
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Resistance to motion
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Earth
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Water
-
Fire
-
Wind
(Digha Nikaya 9)
dhātu
’elements’, are the ultimate constituents of a whole.
(1) The 4 physical elements (dhātu or mahā-bhūta), popularly called:
earth, (pathavī-dhātu)
water, (āpo-dhātu)
fire, (tejo-dhātu)
wind, (vāyo-dhātu)
are to be understood as the primary qualities of matter.
In