Whereof one cannot speak, thereof one must be silent.[Wovon man nicht sprechen kann, darüber muss man schweigen.]
We always speak well when we make ourselves understood.[Quand on se sait entendre, on parle toujours bien.]
Think well before you speak because your words may plant the seed of either success or failure in the mind of some other person.
There are many cases in which plain speaking would become ridiculous, and could hardly be tolerated.[Il est bien des endroits où la pleine franchise Deviendrait ridicule, et serait peu permise.]
Men can govern anything more easily than their tongues, and restrain anything more easily than their appetites.