I relate to this quote not regarding to smoking but, to repeat the exercise.
Many a times, I began running for five km. I run for a few days, I stop running and start playing basketball. Without a regular warm up, I play basketball and it has strained my knees. Falling out of form, I stop playing all the way and I laze around waiting to start again.
This happened for months. In this way, I started again, running now. Hope I stick to this habit, despite I may go to playing basketball soon.