The dons are too busy educating the young men to be able to teach them anything. - Samuel Butler

The written law is binding, but the unwritten law is much more so. You may break the written law at a pinch and on the sly if you can, but the unwritten law — which often comprises the written — must not be broken. Not being written, it is not always easy to know what it is, but this has got to be done.

Tell me, O muse, of that ingenious hero who traveled far and wide after he had sacked the famous town of Troy. Many cities did he visit, and many were the nations with whose manners and customs he was acquainted; moreover he suffered much by sea while trying to save his own life and bring his men safely home.

Any fool can tell the truth, but it requires a man of some sense to know how to lie well.