One log does not burn long by itself.
More German Proverbs:
He who can does, he who cannot, teaches.German
Who has, let him thereof take heed; love wanes, misfortune comes with speed.
German
No one can guard against treachery.
German
He who would make a golden door must add a nail to it daily.
German
Misfortune, wood, and hair, grow throughout the year.
German
When the pear is ripe, it falls.
German