Sometimes a picture or an exercise can completely change your outlook, or understanding, simply by the process of re-jiggling the concepts and outlooks you've got in your mind. Think of it like a metaphorical 'shake' of your marble jar.
Sometimes life seems really short, and other times it seems impossibly long. This chart, showing the average life week by week, all on a page for you, helped me grasp the concept that they are most definitely finite.
Those are your weeks and they’re all you’ve got.