Don’t be a lion in your own house.
More Czech Proverbs:
Don't jump high in a room with a low ceiling.Czech
The God who gave us teeth will also give us bread.
Czech
Gentlemen don't want to give much and are ashamed to give little.
Czech
Politeness pleases even a cat.
Czech
If you want to hear the truth about yourself -- offend your neighbor.
Czech
When the fool knows when to be silent, he would be sitting among the wise.
Czech