Home » Phrases • Uncategorized » “They did not know it was impossible so they did it” Mark Twain “They did not know it was impossible so they did it” Mark Twain By Andres Trevino March 29, 2016 Phrases Uncategorized No comments Tweet Pin It “They did not know it was impossible so they did it” Mark Twain Related Posts “It is better to light one candle than curse t... In medicine, hope is a vital currency. New live immune picture