Idiom
something speaks for(something) speaks for (itself)
something does not need explanation.Her behavior speaks for itself, and it doesn't matter what anyone else thinks about it.Is the experiment a success? I think the numbers speak for themselves.
Usage notes: often used in the form let something speak for itself:
The record company didn't push her album, they simply put it out and let the music speak for itself.
Obj. was given as "itself/themselves," but when we use "yourself," we don't also give "yourselves," not to mention "herself," etc. as under "spectacle" below, so I don't see why we must give the plural form here.--SL, 1/03