Grease to the wheels.
More Italian Proverbs:
Who has love in his heart has spurs in his sides.Italian
He is miserable once, who feels it; but twice, who fear it before it comes.
Italian
Wolves don't eat wolves.
Italian
He that passeth by, and meddleth with strife belonging not to him, is like one that taketh a dog by the ears.
Italian
The wolf is always said to be bigger than he is.
Italian
Necessity becomes will.
Italian