[beaconstudios]

I think it's also useful to know which philosophers addressed which subject. Knowing that Nietzsche wrote about existentialism and his projections on the secularisation of the West is important, and many people's entry to that are his quotes about the abyss and the death of God. If you're wanting to dive deeper into one of these topics, you would know to read his works or the works of philosophers who followed or preceded in his tradition.