A rolling stone gathers no moss.
A penny saved is a penny got [earned].
A miss is as good as a mile.
A lie will go round the world while truth is pulling its boots on.
A lie has no legs.
A golden key can open any door.
A friend in need is a friend indeed.
A dog does not eat a dog.
A danger foreseen is a danger avoided.
A cobbler should stick to his last.