After the maggid’s death, his disciples came together and talked about the things he had done.  When it was Rabbi Schneur Zalman’s turn, he asked them: “Do you know why our master went to the pond every day at dawn and stayed there for a little while before coming home again?”  They did not know why.  Rabbi Zalman continued: “He was learning the song with which the frogs praise God.  It takes a very long time to learn that song.”