(Questioner) ‘Afterwards, you said that the Upanishads are the source of knowledge. Do you imply by this that there are no other valid sources of knowledge?’
A. The answer is that intuition (intuitive knowledge) and the sastras (scriptures) are the only means of transcendental knowledge — ‘This alone is your Atman (Spirit), who is the innermost entity of everything (Br.3.4.2)’…That Reality or innermost entity should be observed within (through introspection or intuition). Because by means of the sastras alone – by means of removing or sublating all those characteristics or qualities which do not belong to Atman – the essential nature of Atman, the Ultimate Reality, becomes known (paraphrasing from SSSS – Satchidanandendra Saraswati).
Unanimous Tradition / Tradición Unánime 