What do you believe is worth spending money on, and what kind of spending do you think people use to fill an emotional gap?

Can giving a narcissistic parent a book about their behavior actually help them, or could it backfire?
Is it really worth learning French if I'm mostly interested in travel and cultural experiences, rather than business or diplomacy?
What is the difference between being truly happy and just being distracted from suffering?
Why might someone fear their own potential for darkness more than any external threat, especially if they identify as an INFJ or INTJ?