Spend life with who makes you happy, not who you have to impress. - there is so much truth in this. Impressing people is exhausting & of the time doesn't work - I like being me. Take Cyndi like she is, or leave me! I'm a happy girl!
The hearth and the Salamander can also mean happiness and if Montag chose to be happy or not. The two things in his life his home and his work. Did it really make him happy. He chose happiness over this home and his work by reading the books.
I'm only responsible for what I say, not for what you understand. Although as an author I am responsible for making readers understand--a reader who doesn't understand is an unhappy reader. (And there is some value to leaving some questions unanswered.