verification of a quote

[Mia Fuentebella <mia@intergate.bc.ca>]

Hi,
i'd just like to double check if this quote is attributed to the right
person.
It is better to keep your mouth shut and appear stupid than to open it and
remove all doubt.
                                                         --Mark Twain
Anyone know for sure?
Thanks in advance!
   Mia  =)
-- 
Everyone thinks of changing the world, but no one thinks of changing
himself.
   - Tolstoy