Unfinished
A man who becomes conscious of the responsibility he bears toward a human being who affectionately waits for him, or to an unfinished work, will never be able to throw away his life. He knows the 'why' for his existence, and will be able to bear almost any 'how'.
When you run a part of the relay and pass on the baton, there is no sense of unfinished business in your mind. There is just the sense of having done your part to the best of your ability. That is it. The hope is to pass on the baton to somebody who will run faster and run a better marathon.
The funniest memory that I can recall about my school days has to be one incident that involved unfinished homework for numerous days. I didn't do any of my homework for days and days at a stretch, and kept stalling my teacher that I was extremely unwell and was under heavy medication.