They both are old and also both have life lessons in it
<span> I </span>will<span> only focus merely on changes of the characters' minds and behaviour which </span>can<span> be noticed while</span>
I wouldn't use the word "discovered" it just seems a bit off. I'd rewrite the sentence with a simpler word yet easy to say and understand: "When we searched the school for damage, a new broken window was found." I hope this helps you. My apologies if this is incorrect.
