The foolish has a wagging tongue.
More Welsh Proverbs:
If you would get ahead, be a bridge.Welsh
A spoon does not know the taste of soup, nor a learned fool the taste of wisdom.
Welsh
When the steersmen are many the ship will sink.
Welsh
The advice of the aged will not mislead you.
Welsh
In every pardon there is love.
Welsh
Old age comes not on its own.
Welsh