According to the Wikiquote page on Isaac Newton, the above quote refers to a metaphor used by one Bernard of Chartres, who was a twelfth-century french philosopher.
So, you know, webcomics can be educational too.
At the very least, I feel more educated since I looked all of that up on Wikipedia just now.
I may not do a lot of research for these comics, but I do at least try to make sure I'm not being obviously stupid.
Appearing to know what I'm talking about,