Once, when the Chofetz Chaim immersed in the mikvah, he found the water to be very cold. He questioned the caretaker, who insisted that he had heated up the water before adding it to the mikvah and even showed him the kettle he had used. The Chofetz Chaim first felt the kettle, then he put his finger into the water of the kettle, and found the water to be lukewarm. He explained to the mikvah attendant, if boiling hot water is added to the mikvah then the water will become warm. However, he noted, if the water is only lukewarm when it is poured into the mikvah, the water will remain quite cold indeed.
Similarly, if we are trying to ignite within our children an excitement and fervor for Yiddishkeit, we ourselves must be piping hot with enthusiasm. If our ardor for Torah and mitzvos is tepid and unenthusiastic, how will our children be energized and invigorated?
-From Rav Dovid Goldwasser, in the Spring 2012 issue of The Klal Perspectives Journal