With accent marks:
Где то́нко, там и рвётся.
Where it is thin, it breaks.
Everything that is in a poor, unsustainable, neglected state becomes a cause of great misfortune, problem, disaster. New troubles begin exactly where it was already bad before.
The same idea is expressed in other languages by many peoples of the world.
The closest English equivalents of this Russian proverb are:
- The chain is no stronger than its weakest link.
- The worst spoke in a cart breaks first.
Other Russian proverbs
Beast runs towards the hunter.
Do not dig a hole for another one, you will fall into it yourself.
The demon is not as scary as he is depicted.
With whom you are friends with, from them you will learn.
Be patient, Cossack - you will become an ataman!
Do not look at a given horse's teeth.
The best is the enemy of the good.
If you like sledding, you should like to carry the sled.