Cunning leads to knavery. It is but a step from one to the other, and that very slippery. Only lying makes the difference; add that to cunning, and it is knavery.
Adde, quod ingénues didicisse fideliter artes Emollit mores, nec sinit esse fervos. To be instructed in the arts, softens the manners and makes men gentle.
Face troubles from their birth, for 'tis too late to cure
When long delay has given the evil strength.
Haste then; postpone not to the coming hour: tomorrow
He'll be less ready who's not ready now.
Take this at least, this last advice, my son:
Keep a stiff rein, and move but gently on:
The coursers of themselves will run too fast,
Your art must be to moderate their haste.
May you live unenvied, and pass many pleasant years unknown to fame; and also have congenial friends.
[Lat., Vive sine invidia, mollesque inglorius annos
Exige; amicitias et tibi junge pares.]