We are told to let our light shine, and if it does, we won't need to tell anybody it does. Lighthouses don't fire cannons to call attention to their shining - they just shine.
Source: In The Ultimate Success Quotations Library, 1997.
-- Dwight L Moody, (Jan 0 0-1999), US evangelist; He promoted, with Ira Sankey, Evangelism in the U.S. and Britain; published Gospel Hymns, 1875.