five stages of knowledge

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Pratyaksa, paroksa, aparoksa, adhoksaja, and aprakrta are five stages of

knowledge or understanding.

 

Srila Prabhupada referrred to them several times in his lectures, for

instance as below.

 

"There are different stages of understanding: pratyaksa, paroksa, aparaksa,

adhoksaja, aprakrta. The ordinary understanding, direct perception, is

called pratyaksa. Now, higher than the pratyaksa understanding is paroksa,

means to gather knowledge from the higher authorities. And above that,

aparoksa, realization. And above that, adhoksaja. Adhoksaja means beyond the

understanding of these material senses. And above that, there is aprakrta,

completely transcendental."

 

>>> Ref. VedaBase => Srimad-Bhagavatam 7.9.9 -- Montreal, July 6, 1968

 

 

Where do these appear in sastra, or where do they first apear in the

writings of acaryas? And what is the context in which they appear, and the

original explanation of them?