Sometimes it’s having the strength to not do the thing you want to do more than anything else in the world. It’s holding back the most natural and understandable and forgivable feelings in the world: taking it personally. Running away. Breaking down. Locking up with fear. Celebrating with joy. Cursing in anger. Exacting retribution. To indulge these passions would be to give your opponents exactly what they want, or worse, to harm an innocent person.