The clay is only one even if a lot of pots are made from it.
The gold is one an the same though lots and lots of ornaments are made from it
The breeds and colours of cows may vary, but the milk is having the same composition
Likewise, the Supreme being is one, although It manifests in many bodies.
(Bahubhaanda roopam mruth pindam ekam eva.. Bahubhooshanaatmakam suvarnamamapi ekam. Api cha bahudhenu jaatham goksheeram api ekam.
Bahu deha vartee brahma api ekam eva.. )