Prayer Skills-Kossov
It was the way of Rabbi Menachem Mendel of Kossov to lead the congregation in prayer himself. In the synagogue there was a screen between him and the people, who would hear his clear and sweet voice, and they too would direct their hearts to pray with love and fear of God in a sweet way. And no one would ever dare to look over the screen into the holy place during the time of prayer.
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But once someone lifted himself up on the wall of the screen to look over, and was startled and jumped back, falling on the ground. He lay there like a stone in a faint, and only with difficulty did they bring him to. Upon regaining consciousness, he told them that he saw the holy Rabbi fully prostrate on the ground and a fire was blazing all around him as if he were an angel of God; and that was why when he looked he was stricken and fainted. (Even Shetiah, pg.22)