It is easier to prevent ill habits than to break them.
More Dutch Proverbs:
When the cat's away, it is jubilee with the mice.Dutch
He runs as fast as if he had eggs in his shoes.
Dutch
He is no merchant who always gains.
Dutch
A fool may give a wise man counsel.
Dutch
Great cry and little wool.
Dutch
It's good to be off wi' the old love, before ye be on wi' the new.
Dutch