The obvious problem is that this motto is less than ideal for a law school: I mean, if anything at all survives the Socratic method in your 1L year, "truth" isn't going to be it LOL :)
So, I submit the ideal motto for a law school would be "Volenti non fit injuria!"
In other words, "To the willing, there is no injury!"
This saying also has the benefit of being grounded in the law of torts.