"Remember how long you have been putting off these things, and how many time the gods have given you days of grace, and yet you do not use them. Now is it high time to perceive,the kind of Universe whereof you are a part and the nature of the governor of the Universe from whom you subsist as effluence, and that the term of your time is circumscribed, and that unless you use it to attain calm of mind, time will be gone and you will be gone and the opportunity to use it will not be yours again." ~Marcus Aurelius Antoninus
In other words: Your time on this earth is short and you only have one shot to work on whatever it is you need to work on. Get to it.