Answer:
Great question
Explanation:
First off, Mildred. She, remember, is not like Montag, she is a bit crazy and is caught up in only her self interest and is only concerned about going against society or aka breaking the law.
Montag, he is touched, because that little girl he met realy opened his mind and heart to the things forgoten and the book is his way back to life.
Theory, Montag represents light (hope) because he searches for that which he can not understand and brings meaning to it like light to darkness
Mildred, represents, darkness (despair) because she doesnt care what new things light shows but is worried that the "new" things are dangerous and should be forgoten. In short, she is affraid of what she could know, could hert her and so shuts it up.