I recently read this quote and put it where I see it often:

“Everyone stands alone on the heart of the earth transfixed by a sun ray and suddenly it is evening.”

In other words:

What are you doing with the substance of your life?

What will you want to have accomplished when it’s over?

What do you want to be remembered for?

What could you do today that would add something to your life or that of others?

What will you do today that matters; that honors that you’re here?

…for so suddenly it is evening.

I would gladly credit the author of this quote but do not know who it was.