The Importance of Joy in Yiddishkeit

A rosh yeshiva said he saw a sefer on hilchos Shabbos for children. It taught the 39 malachos, everything that is prohibited on Shabbos. This rosh yeshiva commented that he would have preferred that the first few pages of the sefer describe the mitzvah of oneg Shabbos and our pleasure on Shabbos. Children shouldn't view Shabbos as a day of restrictions but instead as a day of pleasure and joy. And then they should study the restrictions.

The father didn't take Reb Dov Yafo's warning seriously. Eventually, both children went off the derech r”l.