In October, I put my feet in the Mediterranean Sea on the shore of Tel Aviv, Israel. The beach was busy with bikes and barbecues as families gathered during the Sukkot holiday. I loved being among them, the sound of ping pongs over the waves, the sight of cooking smoke wafting over the hill. At one moment in each wave's roll into shore, it churned up a bottle green light and held it aloft before rolling on. I wanted to catch it.