They are doing so many sinful acts on account of this body; still, they are going as religious, or spiritualist. Nobody is spiritualist unless one understands his spiritual identification, neither one is religious. Therefore in the Bhagavad-gita the last word is sarva-dharman parityajya mam ekam saranam vraja [BG 18.66], because you rascal, fools, you have created so many religious system simply on the differences of body. That is not religion. Real religion is that "I am the Supreme Soul, Parambrahma, Krsna. And you are My part and parcel. So we have intimate relation, like father and son. So it is the son's duty to obey the father. That is perfection of life."
Lecture on Bhagavad-gita 2.14, London, 20 August, 1973