I have repeatedly mentioned the Nātha’s principle, which is used in many Nātha texts, as well as in A. K. Banerjee’s books – it is dvaitādvaita-vivarjita.
There are many who call themselves tantrikas. They say that Gorakśanāth and nāthas are not oriented towards the same principles as Kashmir Shaivism, etc. In general, I have already said that I do not consider those tantrikas to be experts in tantrism. It is better I quote a śloka from the famous kaula text of ūrdhvāmnāya – Kulārṇava-tantra (ullāsa I, śloka 110).
अद्वैतं केचिदिच्छन्ति द्वैतमिच्छन्ति चापरे |
मम तत्त्वं न जानन्ति द्वैताद्वैत विवर्जितम् ||
advaitaṃ kecidicchanti dvaitamicchanti cāpare |
mama tattvaṃ na jānanti dvaitādvaita vivarjitam ||
Someone prefers non-duality, someone – duality, none of them knows the essence that is beyond duality and non-duality (dvaitādvaita vivarjitam).
These are absolutely the same reference points as in the Nātha-sampradaya, sometimes the same terms and ideas can be found in tantric sources, but under different names (advaitadvayta-vilakśana, advaya, pratyakśa-advaita, etc.).