More importantly IMO than it being unnecessary is that there is no indication of what is going to be behind the rot31 so I don't know whether it's safe to rot13 or not. The first sentence would be best left in plain-text.

For rationality quotes where the meaning is opaque, I like to include an exegesis; but I don't want to make the exegesis trivial to read because then people won't think about it for themselves. I'm sorry if you don't like that.