The world stretches out in front of the young, to the far horizon. Time telescopes as you get older, and every future falls within reach. It doesn't matter how long it's going to be, in my eyes it's already here.
Andrew Marvell, in his marvellous poem To His Coy Mistress, writes:
But at my back I always hearRead the rest of it here.
Time's wingèd chariot hurrying near