Brevity is the soul of wit Link to proverb.
In for a penny, in for a pound.
Appearances can be deceptive.
Beat swords into ploughshares Link to proverb.
Beware the Ides of March Link to proverb.
More haste, less speed Link to proverb.
You can't hold with the hare and run with the hounds Link to proverb.