"Your data should be alive in 80 years, especially if you are." To which you might add, "We're here to help you make sure that's what happens". Then follow that with the "Things Perkeep believes ..." section.
After that, the mission is clear, how it works is clear (though many people might have -no idea- what 'Open source' is good for). Only Then (IMO) can you get away with going all technical on them!