I love the feeling of helping people help themselves.

Doing it for someone takes eleven minutes. Showing them takes forty, in the rain, with the jack in the wrong place twice.

The slower one is worth more and feels worse, because you're standing there watching somebody be bad at something while your hands itch to take over. That itch is the whole difficulty. Most people who give up on teaching give up in the fourth minute — not out of impatience with the learner, but out of discomfort at being useless. Being briefly useless is the price of the other person never needing you for this again.