If you wish another to keep your secret, first keep it to yourself.

Leave in concealment what has long been concealed. [Lat., Latere semper patere, quod latuit diu.]

Revenge is an inhuman word. [Lat., Inhumanum verbum est ultio.]

Prosperity asks for fidelity; adversity exacts it. [Lat., Poscunt fidem secunda, at adversa exigunt.]

Fidelity bought with money is overcome by money. [Lat., Pretio parata vincitur pretio fides.]

He is not guilty who is not guilty of his own free will. [Lat., Haud est nocens, quicumque non sponte est nocens.]