Teaching does not always feel rewarding. It doesn’t need to be. It is a repayment of something that was done for you. It is not a good thing that you do; it is an obligation that you have. If you are not preserving and expanding your trade, then you are a leech, and you do not deserve to prosper in it.
Whom have you taught, lately?
Projects undreamed of by past generations will absorb our immediate descendants, comforts, activities, amenities, pleasures will crowd upon them, but their hearts will ache, and their lives will be barren, if they have not a vision above material things.
Winston Churchill, 1932