An ant hole may collapse an embankment.
More Japanese Proverbs:
The very thing one likes, one does well.Japanese
Even the stone you trip on is part of your destiny.
Japanese
Steal goods and you'll go to prison, steal lands and you are a king.
Japanese
Cover the ears and steal the bell.
Japanese
Forgetting your native tongue means forgetting your native country.
Japanese
Wisdom and virtue are like the two wheels of a cart.
Japanese