I first met Elie Kaunfer in 2001 when a friend of a friend invited me to a Saturday morning prayer service that Kaunfer and friends had organized in a Manhattan apartment. Kaunfer, then 27, was working as a corporate-fraud investigator, and the minyan was his side project. But Kaunfer is hyper-organized, passionate, and single-minded; his hobbies are not like yours and mine. That minyan soon started meeting regularly in a rented church basement. It acquired a name—Kehilat Hadar—a website, subcommittees, spreadsheets, weekly Torah Study sessions, and an annual Shavuot retreat attended by hundreds.