Seuss definition of love: We're all a little weird, and life's a little weird. And when we find someone whose weirdness is compatible with ours, we join up with them and fall in mutual weirdness and call it LOVE. I love this!
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.