There is an alternative:
Take a screenshot of somewhere that shows the quote in full and point the reader to the picture (that you load onto your page). That way Google cannot see the quote but the reader can.
If you don't know how to take a screenshot:
Find the 'prt scr' on your keyboard.
When the page you want is loaded click ctrl & prt scn
Go to 'Paint' - free on all PC's and click ctrl v
The screen will show as a picture.
Place a rectangle around the part of the page you want and cut it out.
Create a new page and paste (ctrl v) the cut out bit.
Save the file as a jpg or png (best).
Use this as your image on your article.
By the way I believe Google has stated that they do not consider quotes as duplicate content as long as there is some unique content associated with it (but if you want to be sure then the above.........)