My advice is: treat it like a huckster’s quote, like the truckload of Einstein quotes invented by an indian guru guy in 1995.
He may have said it, but the source is this guy.
Ralph’s experience with the maharaja’s son led him to:
“… a conversation with the famous scientist, Dr. Nikola Tesla, in 1942. Tesla said,
’If you want to find the secrets of the Universe, think in terms of energy, frequency and vibration.’ I spent the last 50 years doing just that, and my products are a direct result of this investigation.”
“I first learned about “purple plates” when I read Linda Goodman’s book Star Signs: The Secret Codes of the Universe in 1987.”
That’s about how and when I learned it too.
“Nikola Tesla is an inventor attributed to inspiring the technology of purple plates, a tachyon energy product. However, information for creating these plates based on Tesla’s ideas came from Ralph Bergstresser, a man who once worked with Tesla.”