There's no making apples of plums.
Nut and fig trees need to be pruned aggressively.
He who feeds a wolf, strengthens his enemy.
Devils must be driven out with devils.
It's better to stand on your own feet than someone else's.
A' are gude lasses, but where do the ill wives come frae?
To speak kindly does not hurt the tongue.
No man's a prophet in his own land.
When the cat's away the mice will play.