"This love-ly, mag-nif-i-cent-ly illus-trat-ed book keeps to the spir-it of Hillel's teach-ing by tak-ing a high-er con-cept and sim-pli-fy-ing it so it can be eas-i-ly under-stood." -- Jewish Book Council Hillel's students never knew what to expect from the rabbi. A mitzvah could be an act of kindness or the observance of a ritual. What did the rabbi mean? What mysterious mitzvah could it be?