quit.

“How do I know when to quit?”

“To stop?”

“Sure . . .”

“Never when it is hard. Never when you should. Never when you must. Never out of fear. Never because someone tells you to. Stop when you are able to stop.”

“When I”m able?”

“When you are able to stop, the end has already begun, in order to make way for whatever new and better thing is on the horizon. You might as well finish the job.”