A contractor friend decided to take on a part-time job teaching at a local technical school. He had never done this before.

“Teaching is hard,” I said. “You sure you want to do this?”

“I do.”

“Why?”

“I’m not sure,” he said. “It’s just a feeling I got.”

“Ok,” I said, “but if you’re going to do it, do it right. You owe that to the students.”

“I know my trade,” he said.