You cannot ethically sell something you do not understand.

You cannot ethically sell something you do not understand.

Grant Cardone

Quote authenticity

Score:	Excellent This quote has an official author source You can cite this quote with confidence as true and correct Listed below is the factual evidence of an official source published by either the author, an author's representative or estate

2017 November 12	Origin: Tweet Link: https://twitter.com/GrantCardone/status/914648787544616961	Image evidence

American author

March 21st, 1958