Details of the various Brahma Vidyās are known as ‘guhya ādesha’ or secret teaching in Upanishads. In each vidyā one discerns a particular attribute or aspect of the Supreme soul.

There are on the whole, 32 Vidyās – there could be one of two more vidyās: there is a slight difference between two āchāryas in the number. Rāmānuja names 32 and Shankara 30. For our purpose, we take the larger number.