don’t regret what cannot be changed

"In a classic sutra, the Buddha had said that if someone shoots you in the foot, don’t pick up the bow and shoot yourself in the foot again. Don’t make your suffering worse by arguing with what’s so. That’s a second arrow. Accept pain. Don’t criticize yourself, or others, for feeling pain: that is a second arrow. Don’t regret what cannot be changed, or try to predict what cannot be known."

- Katy Butler, "A Life Too Long", tricycle.com