Our grand business in life is not to see what lies dimly at a distance, but to do what lies clearly at hand. --Thomas Carlyle.
Which strikes a chord with me, albeit in a fuzzy late-Friday-afternoon kind of way.
And it's not to say that we should never look into the distance. It's important to think about it a little. But unless you're the Hubble Telescope, simply looking probably isn't your main purpose in life.
Prognosticating can be fun, but it can be hollow too. Sometimes it just leaves me with a "But now what?" feeling. What's really satisfying - always and without fail - is when I can see something that needs doing, and do it, and it's done, and the world is a bit of a better place.