voice of reason

voice of reason (plural voices of reason)

1. One who articulates a sensible interpretation or course of action.
   • 2004, Hawkster, “Memorial day 2004”, in alt.radio.talk.dr-laura (Usenet):

     As if your hair-splitting, shifting-sands postathons are the lonely voice of reason in an uncomprehending universe.

   • 2004, Tom Shone, Blockbuster: How Hollywood Learned to Stop Worrying and Love the Summer, page 285:

     [A]s Han Solo, always the voice of reason in the series, says, “I'm out of it for a little while, and everyone gets delusions of grandeur.”