Time... do we understand it yet?

Our family watched the Stephen Hawkins  movie a few nights ago and suddenly we are so aware of how little we really know about what time really is.  I just read that he is 74 years old so in his lifetime, I wonder if he will know all there is to know about the topic? And then I remember wondering if any of his children will continue his love of the topic??

Yesterday is ashes; tomorrow wood. Only today does the fire burn brightly.
Old Eskimo Proverb

*I wonder if that really is true??

Whether it's the best of times or the worst of times, it's the only time that we've got.
Art Buchwald

*or is it?