Joy.

There are two kinds of joy. There’s expressive joy, the joy you experience and communicate because that’s how you feel. But there’s also therapeutic joy, the joy you will yourself to feel in order to protect yourself against negative emotions ... 

We will not be intimidated. We will not be traumatized. We will not be defined by our enemies. We will live with the threats and even laugh at them because what we can laugh at, we cannot be held captive by ... It’s about surviving, and beyond that, thriving, even as we walk through the valley of the shadow of death.

Rabbi Lord Jonathan Sacks