The open door invites the thief.
More Dutch Proverbs:
The friar preached against stealing when he had a pudding in his sleeve.Dutch
Every one is a preacher under the gallows.
Dutch
A man in not known till he cometh to honour.
Dutch
By the living we bury the dead.
Dutch
When thieves fall out, honest men get their goods back.
Dutch
A fool may give a wise man counsel.
Dutch