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 while crossing streams.' Abraham Lincoln
Never swap horses crossing a stream. American Proverb
You do not swap horses while crossing the ford. Russian Proverb
Don't swap horses when crossing the stream. Russian Proverb