Walking in my North London neighborhood, I can hear snatches of conversation in many languages—Polish, Japanese, Hindi, Croatian, and Italian, to name a few. This diversity feels like a taste of heaven, yet I can’t understand what they’re saying. As I step into the Russian café or the Polish market and hear the different accents and sounds, I sometimes reflect on how wonderful it must have been on the day of Pentecost when people of many nations could understand what the disciples were saying.

On that day, pilgrims gathered together in Jerusalem to celebrate the festival of the harvest. The Holy…