This is Education

18:19 כי ידעתיו למען אשר יצוה את בניו ואת ביתו אחריו ושמרו דרך ה׳ לעשות צדקה ומשפט
For I know him, that he will instruct his children and his household after him, so that they will keep the path of G-d, to do righteousness and justice

just as it is incumbent upon every Jew, from the greatest scholar to the most simple of men, to put on tefillin every day, in the same way there is an unequivocal duty which rests upon every individual to set aside half an hour each day to think about the education of his children.
— Rabbi Sholom DovBer of Lubavitch

“This is Education”

Rabbi Yosef Yitzchok of Lubavitch once told:

A child remains a child. On Rosh Hashanah of 5649 (1888), when I was a child of seven and several months, I visited my grandmother and she treated me to a melon. I went out into the yard and sat with my friends on a bench directly opposite my father’s window and shared the melon with them.

My father called me in and said to me: “I noticed that you did indeed share with your friends, but you did not do it with a whole heart.” He then explained to me at length the idea of a ‘generous eye’ and a ‘malevolent eye.’

I was so deeply affected by my father’s words that I was unable to recover for half an hour. I wept bitterly and brought up what I had eaten of the melon.

“What do you want from the child?” asked my mother. Father replied: “It is good this way. Now this trait will be ingrained in his character.”

Concluded Rabbi Yosef Yitzchok: “This is education.”

Source: Sefer Hasichos 5705 (Talks of Rabbi Yosef Yitzchok of Lubavitch 1944-45), p. 40 (Correction: pp. 10-11).