Keep Calm and Carry On

So last night I was wondering why departments aren’t festooned with posters like this and/or students sporting the latest memeish Ovidian attire:

… just in case someone searches for “Keep Calm and Carry On” in Latin; we Classics types were keeping calm and carrying on since the fall of the Republic or thereabouts … the full quotation is
perfer et obdura! dolor hic tibi proderit olim;  saepe tulit lassis sucus amarus opem (Ovid, Amores 3.11a.7-8 (from the Latin Library … can’t seem to find it in Perseus) or perfer et obdura; multo graviora tulisti (Tristia, 5.11.7) … created with the Keep Calm-o-matic