Board Thread:Episode Discussion/@comment-410526-20160214074328/@comment-4010415-20160214143037

When Salem says "smaller soul" she is referring to the very first episode of Volume 1, when Ozpin said to her: "But perhaps victory is in the simpler things that you've long forgotten. Things that require a smaller, more honest soul."

So, she's saying that, when Ozpin's guardians fail and he asks Ruby for help, he should know that he will be sending Ruby to the same pitiful demise that everyone else has faced.