I have not permitted myself, gentlemen, to conclude that I am the best man in the country; but I am reminded, in this connection, of a story of an old Dutch farmer, who remarked to a companion once that it was not best to swap horses when crossing streams.
Reply to delegation from the National Union League approving and endorsing "the nominations made by the Union National Convention at Baltimore." New York Times, Herald, and Tribune (10 June 1864) Collected Works of Abraham Lincoln. Volume 7
Collected Works of Abraham Lincoln. Volume 7.[quod.lib.umich.edu]