From the incredibly inspriring graduation speech by Paul Hawken given last week at the University of Portland:

“There is invisible writing on the back of the diploma you will receive,
and in case you didn’t bring lemon juice to decode it, I can tell you
what it says: YOU ARE BRILLIANT, AND THE EARTH IS HIRING. The earth
couldn’t afford to send any recruiters or limos to your school. It sent
you rain, sunsets, ripe cherries, night blooming jasmine, and that
unbelievably cute person you are dating. Take the hint. And here’s the
deal: Forget that this task of planet-saving is not possible in the
time required. Don’t be put off by people who know what is not
possible. Do what needs to be done, and check to see if it was
impossible only after you are done.”

You can see Paul Hawken’s entire, wonderful speech here.