speak for itself/themselves
To have a clear meaning or explanation. I think my work these past few months speaks for itself and makes me more than qualified for this position.
speak for itself
and speak for themselves[for something] not to need explaining; to have an obvious meaning. The facts speak for themselves. Tom is guilty. Your results speak for themselves. You need to work harder.
speak for itˈself/themˈselves
be so clear or obvious that no explanation or comment is needed: The expressions on their faces spoke for themselves — they hated the song.