He understands badly who listens badly.
More Welsh Proverbs:
If you would get ahead, be a bridge.Welsh
A watched clock never tells the time.
Welsh
People aren't good unless others are made better by them.
Welsh
Three things give us hardy strength: sleeping on hairy mattresses, breathing cold air, and eating dry food.
Welsh
A wife's advice is not worth much, but woe to the husband who refuses to take it.
Welsh
Reason is the wise man's guide, example the fool's.
Welsh