When you teach your son, you teach your son's son.
The Talmud in Wikipedia
Laziness erodes a person of his enthusiasm and energy. As a result the person loses all opportunities and finally becomes dejected and frustrated. The worst thing is that he stops believing in himself.
I have only one brother, but both my parents had huge families. (One of my grandmothers had) 44 grandchildren. ... I have 60 first cousins.
We shall not cease from exploration and the end of all our exploring will be to arrive where we started... and know the place for the first time.