The Paradox of Giving

The word 'promise' comes from the Latin 'promittere' meaning 'to send forth'—you literally send it away to keep it.

Forgiveness has been shown to lower blood pressure and reduce stress. Giving it away improves your own health.

A boomerang that doesn't return is called a 'kylies'. True returning boomerangs were used for sport, not hunting.

In neuroscience, giving advice activates the same reward centers in the brain as receiving money.