“Sheepdogs, so the flock can rest at ease (and not even know that they’re safe...)”
Lt Col Jim Grossman (www.killology.com) uses that comparison. I’ve adopted it as well.
Colonel, USAFR
We’re all Sheepdogs, Colonel sir. Only OUR hair doesn’t cover our eyes...and we see very, very clearly. To the continuing detriment of those inclined towards nefarious behavior.