No lock avails against a hatchet.
More French Proverbs:
He will not lose his oats for want of braying.French
Whoever rubs himself with garlic will not smell of cloves.
French
A little help does a great deal.
French
Who is born a chicken loves scratching.
French
One meets his destiny often in the road he takes to avoid it.
French
One beggar at the door is enough.
French