Goodreads Librarians Group discussion

Hello,
The quote "I will not let anyone walk through my mind with their dirty feet," is attributed to Mahatma Gandhi on your website, but a friend is questioning that, citing this source...http://ask.metafilter.com/157716/Help...

What source did you use that shows that this quote is by Gandhi? I really appreciate your help! Thanks!

Any Goodreads user can add quotes, and while adding a specific source (when that is a published book that can be linked) is encouraged, it is not required.

That one was added to the site in 2007.

I understand that a source is not required. My question really is to find help in finding the source of the quote.