I was raised on the Vince Lombardi adage that "winners never quit and quitters never win." But I've learned that sometimes quitting is the most courageous thing to do. Early in my career I was once on a temp job where I witnessed a male executive demand that a female employee get down on her knees in front of him to apologize for a mistake. She did it. And I immediately grabbed my purse and walked out. I've thought of that moment several times since comedian and actress Leslie Jones quit Twitter this week in response to the sexist and racist harassment she's received from online trolls since the premier of Ghostbusters. In disgusting memes, users compared her to a primate. In one pic she had semen on her face. The lesson? Integrity trumps staying. Always remember ladies: Winners can quit and quitters can win. You go, Leslie.