Answer:
The meaning of this is basically whatever doesn't break you makes you stronger. As you struggle you learn from it. You will be stronger tomorrow because you have struggled in the past.
Explanation:
It is spoken by a single character
it reveals Lomov's personal thoughts
Based on that passage, I'd say the young man is active because he's jogging, and friendly he smiled in encouragement to elderly men. Nothing in the passage indicates that he is either intelligent or snobbish.
