(3.21) Extremes are designated by distinctive names such as inside and out, top and bottom, light and dark, good and bad.
(3.22) These are not seperate entities but parts or aspects of the whole.
Tantra often talks of “the end of duality.” This refers to the dissolution of judgement with regards to extremes, as refernced in 3.21-22. The end of duality does not mean that “good” and “bad” in the moral sense do not exist, rather that we do not judge experience as it happens to us. Karma comes to us as a result of our thoughts and actions. Thus, it should be clear that Tantra advocates the importance of personal responsibility. The end of duality is NOT an abandonment of morality.
Aperture of Brahma 