On the night of 24th Sivan, 5717/1957, the Rebbe told a Tomim during yechidus that, "studying Chassidus can be compared to immersing in a mikve. Just like immersing in a mikve only takes a short time but affects the whole day, making it pure, learning a little Chassidus each morning also has a very palpable effect on the rest of the day. And just as the immersion ritually purifies a person only if his hair is completely underwater, and if it isn't the person is not pure, this is also the case with learning Chassidus. During that time, the person needs to be totally immersed in what he is learning."

Translated from the Kfar Chabad Magazine