An angry man opens his mouth ...

An angry man opens his mouth and shuts his eyes.
An angry man opens his mouth and shuts his eyes.
 Cato the Elder

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

Between the mouth and the morsel many things may happen.
 Cato the Elder
Woman is a violent and uncontrolled animal, and it is useless to let go the reins and then expect her not to kick over the traces. You must keep her on a tight rein . . . Women want total freedom or rather - to call things by their names - total licence. If you allow them to achieve complete equality with men, do you think they will be easier to live with? Not at all. Once they have achieved equality, they will be your masters . . .
 Cato the Elder