One Purim night, we were Farbrenging with Rabbi Wagner in the big Zal, and Reb Mendel came in. We asked him to say something and he said that later on in the Farbrengen, he will reveal a big secret that was taught in Tomchei Temimim in Lubavitch. We waited and waited and he was quiet. Many Talmidim went to sleep, but I stayed up. Hours later, the big revelation came. He got up and said: "In Lubavitch hut men Oisgelernt Az men lernt nisht, vaist men nisht - In Lubavitch it was taught: If you do not learn, you will not know anything" and with those words he left the Farbrenge