Despite blowing up in popularity, manifestation has been mentioned throughout history in numerous different cultures, including Buddhism and Christianity. Yet when it comes to modern practices, many of its attributes can be accredited to Hinduism, the world’s oldest faith/religion.
Beside above, is law of attraction a sin in Hinduism?
Pretty much all of Hindu philosophy, unlike most belief systems, is experientially verifiable, so definitely not a myth. To your question on this so called law of attraction, Hindu Rishis have gone way way further than that. The Rishi declares that all of existence can be seen to be one with the deepest Self of us.