You do not really understand something unless you can explain it to your grandmother.
More Russian Proverbs:
If you don't have a hundred rubles, make sure you have a hundred friends.Russian
The sober man's secret is the drunkard's speech.
Russian
One can get sick of cake, but never of bread.
Russian
Absentmindedness is searching for the horse you are riding.
Russian
Many who have gold in the house are looking for copper outside.
Russian
Rooster today, feather duster tomorrow.
Russian