You cannot ethically sell something you do not understand.

You cannot ethically sell something you do not understand.

Grant Cardone

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2017 November 12	Origin: Tweet Link: https://twitter.com/GrantCardone/status/914648787544616961 #grantcardone #quoteoftheday pic.twitter.com/Im93GNvRYL — Grant Cardone (@GrantCardone) October 2, 2017	Image evidence