Power corrupts; absolute power corrupts absolutely Link to proverb.
An eye for an eye, a tooth for a tooth.
One man's meat is another man's poison Link to proverb.
A rolling stone gathers no moss Link to proverb.
The leopard does not change his spots Link to proverb.
Don't bite the hand that feeds you.
Sticks and stones may break my bones, but words will never hurt me Link to proverb.