In the and the layers of Vedic texts, the syllable is so widespread and linked to knowledge, that it stands for the "whole of Veda".
According to Pashaura Singh, Onkar is used frequently as invocation in Sikh scripture; it is the foundational word , the seed of Sikh scripture, and the basis of the "whole creation of time and space".
The word which all the Vedas proclaim, That which is expressed in every penance, austerity, meditation , That for which they live the life of a , Understand that word in its essence: Om! It wasn't to hurt, Provoke or to start any debate.
It has variously been associated with concepts of "cosmic sound" or "mystical syllable" or "affirmation to something divine", or as symbolism for abstract spiritual concepts in the Upanishads.