Social experiment - single thoughts on programming that made an impact

With the indulgence of the regulars, I'd like to try an experiment. Recently, as a result of an item here, I read an article from which a single line has stuck. It wasn't the most profound, it wasn't the most amusing, it wasn't even necessarily the most valuable, but it's one that has immediately made me think differently, and will be with me a long time.

I'd like to create a collection of such things. I'm pretty sure things that affect you guys will be of varying value, but if we make a list and then let them float up and down as they get modded, maybe we'll get something interesting.

Replies are discouraged. These will not be universal truths, they will not be unarguable, but I suggest that this is not the place. Perhaps if you really disagree you can blog about it and submit a link. But perhaps not here - perhaps as a main item.

Worth a try? Who will play along? I'll start ...