Work while you have the light. You are responsible for the talent that has been entrusted to you.
I find this quote to be a lovely turn of phrase, and thought provoking at the same time. "Work while you have the light." Isn't that a beautiful, literal and figurative, phrase?
The second part of this is more of an admonishment, or perhaps a reminder, that we must use the talents we are given. It gives credence to the idea that we must make the most of them, too.
I would go one step further and say that it instructs us to be doing what we, individually, were meant to be doing. Otherwise, we are not acting responsibly toward our talents. So, to be in a profession that doesn't make your heart sing is not treating your talent as it deserves to be treated.
So much to think about.