Answer:
This saying encourages people to be strong and resilient.
Step-by-step explanation:
The saying is a word game that refers to the fact that people get stronger when difficult situations arise. As was said in the question the saying is referring to the feeling of resilience, because it says that when things get tough people must harden, get stronger to face these things. In short, the saying urges people to be strong, resilient and not to give up without a good fight.