Only knowledge that is used sticks in your mind.

Only knowledge that is used sticks in your mind.

Dale Carnegie

Quote authenticity

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2017 November 09	Link: https://books.google.com/books?id=pO81Li8zEPwC&pg=PT208&dq=Only+knowledge+that+is+used+sticks+in+your+mind.dale+carnegie&hl=en&sa=X&ved=0ahUKEwib5NPZqYDWAhUDybwKHWCaBBoQ6AEIKDAA#v=onepage&q=Only%20knowledge%20that%20is%20used%20sticks%20in%20your%20mind.dale%20carnegie&f=false	Image evidence

American writer and lecturer

November 24th, 1888 - November 1st, 1955