It would be good to have two mouths and speak to yourself with both.
More Icelandic Proverbs:
Hunger, work, and sweat are the best herbs.Icelandic
He who lives without discipline dies without honor.
Icelandic
Better wise language than well combed hair.
Icelandic
Much always longs for more.
Icelandic
A greasy kitchen; a will with not much in it.
Icelandic
The revenge that is postponed is not forgotten.
Icelandic