Title text:
It’s important to teach yourself to feel responsible for random events, because with great responsibility comes great power. That’s what my wise Uncle Ben told me right before he died; he might still be alive today if only I’d said rabbit rabbit that year!
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3191/


ok, I have to address the elephant in the room: is the bad image quality intentional (part of the joke) or not or what is going on here?
in case it gets fixed, here it is right now:
TIL that there is a 2x size version of many xkcd comics, which the explainxkcd bot seems to have downloaded and which looks a lot better: https://www.explainxkcd.com/wiki/index.php/File:superstition_2x.png / https://imgs.xkcd.com/comics/superstition_2x.png
edit (c. 9 hours later, the morning after in my timezone): ok, it seems it has been fixed, so it was apparently not intentional
(The post is still showing the pixelated image for me)
By “the post” what do you mean? The one in my comment is obviously the pixelated one, I am going to keep it that way for future documentation; the one on xkcd.com has however been fixed.
The original post by the bot
That’s just a link to the image hosted on xkcd.com, so if that is still pixelated, it’s probably a caching issue.