All the concepts in Vedas highly emphasize on purity and on the satvic to the farther extent on the rajasic style ofworships. Example of satvic worship is any simple hawans for peace etc and examples of rajasic forms can be rites,ashwametha. But most people in kali yuga find it difficult to associate with satwa guna completely. Pure rajasic formsare also difficult to be found. So most of us stay between rajasic and tamasic characteristics hence most of the timespeople find it difficult to honor promises for a ritual at the deepest level and hence vedic rituals are not beingperformed as an anustana in its essential essence. Aghora is one of the faster and refined forms for the rajasic,tamasic forms of beings. But during ancient times, for a vedi to achieve rishihood, it’s said that he should havemastered Aghora too.Aghora is the height is Vama Marga Tantra in its essence