Every frog must know its sole-leather.
More Bulgarian Proverbs:
You will sell more sheepskins at the market than wolfskins.Bulgarian
Have your cake and eat it too.
Bulgarian
Watch your step when you walk: you may find nothing but you will not stumble.
Bulgarian
He who does not work, must not eat.
Bulgarian
Ravens do not peck each other's eyes out.
Bulgarian
New day -- new destiny.
Bulgarian