He who lives by the sword dies by the sword.
More German Proverbs:
Better a good cow than a cow of a good kind.German
The beginning hot, the middle lukewarm, the end cold.
German
If you've money, take a seat; it you've none, take to your feet.
German
In a calm sea, every man is a pilot.
German
Saying and doing are two things.
German
He who would climb the ladder must begin at the bottom.
German