This should be committed to memory for future use because it applies to 99% of humanity, so potentially you could use it every day, including with yourself (in the latter case, just think of the proverb, rather than saying it out loud, to avoid self-contradiction).
The way the Venetians have managed to implement this in an effective and practical way is to keep their mouths occupied in a more edifying manner, namely, the consumption of cicchetti and ombre (snacks and wine). Sounds good to me.
