The answer to your question is love.
Answer: Vanity
Explanation: Vanity is excessive pride in one’s achievements and / or appearance. In the passage, the protagonist grew more in love with herself and her pride is described as darkening, which means it became something negative. Vanity is considered negative while self-love and self-admiration are positive when you experience them in healthy amounts.
<em>For Scrooge, Christmas is nothing but a fraud or a humbug and not a reason to be happy for a celebration because he has no money or poor. His nephew (Fred) answered him that although they are poor, it is still a reason to celebrate because it is that one time of the year where people rejoice and open up presents and hearts.</em>
Seductive thinking is right I think