Primum non nocere

Primum non nocere, means "First, do no harm." It is not part of the Hippocratic Oath as is often believed. But it is a precept taught to all medical students. Actually, the whole phrase is "Primum non nocere, nisi is non persolvo" which means, "First, do no harm, unless he doesn't pay." Which is why surgeons will sometimes leave sponges of surgical tools in you when they suspect you might run out on your bill. Which, you know, fair's fair. But what about these Jihadi doctors over in the UK? Pretty much missed the point, wouldn't you say?

So maybe we should change it to, "Primum non nocere, quod nos vere vilis is", which is as close as I can get to: "First, do no harm, and we really mean it."