Many of our problems are broadly similar to those that undermined ... Norse Greenland, and that many other past societies also struggled to solve. Some of those past societies failed (like the Greenland Norse) and others succeeded ... The past offers us a rich database from which we can learn in order that we may keep on succeeding.
It's being here now that's important. There's no past and there's no future. Time is a very misleading thing. All there is ever, is the now. We can gain experience from the past, but we can't relive it; and we can hope for the future, but we don't know if there is one.
But now isn’t simply now. Now is also a cold reminder: one whole day later than yesterday, one year later than last year. Every now is labeled with its date, rendering all past nows obsolete, until - later of sooner - perhaps - no, not perhaps - quite certainly: it will come.