Sorry for the brevity of this post, but I'm struggling with an unholy combination of exam preparations and manflu.
This is, in my opinion, one of the greatest and inspiring orations in human history. It's Carl Sagan's reaction to the famous "Pale blue dot" image from the voyager satellite. I once used a picture of this as a Christmas Card and captioned it "This is the only photo I could find of everyone". The speech reminds us of the fragility of our world, our duty to preserve our planet and the importance of showing kindess and solidarity to our fellow human beings, as our blue pixel drifts through a lonely cosmic void.