"... and let not the wayward post lead you into complacency, for the way is the last and the last is to post." - LOR, 13.7
No, this is a different verse.. (Ahem) “... and let the thread’s deliciousness not tempt you into sin. For the thread is fickle and changeable and constancy is but a whisper of a dream...” Honestly, it goes on about it a bit too long in my opinion.
"Thou shalt not be an anorak." "Thou shalt not commit acts of beardyness upon thine opponent." "Thou shalt not spill thy soda upon the table of gaming, lest thee be called an oaf." "Thou shalt let the dice fall as they roll, unless thou art playing Age of Sigmar and canst reroll things..." "Thou shalt not lose faith in the Kings of the Tomb, for Settra is Eternal and shall return..."