Nothing says "welcome to statistical mechanics" quite like casually mentioning that the pioneers of the field committed suicide! The textbook's subtle suggestion that studying this subject might drive you to a similar fate is just *chef's kiss* motivational.
The author's "approach the subject cautiously" advice takes on a whole new meaning when it follows the highlighted obituaries. It's like saying "Here's a field so mentally taxing it literally killed its founders... anyway, let's start with perfect gas equations!"
Pro tip: If your professor assigns this textbook, maybe check if they've included the campus counseling center number in the syllabus.