The Beginning of Infinity
It's easy to be nihilistic. You might even try to claim that it's rational to be nihilistic. Just look up. There are a hundred billion stars in a hundred billion galaxies (that we know of!). What are we but a spec of dust? And don't get me started on entropy...
I certainly went through a bit of phase. And then, one day, I read a book and everything changed. That book was The Beginning of Infinity by David Deutsch.
Well I say 'one day', but actually it took me forever to read. Eventually I managed to finish it during a month-long sail across the Atlantic, where I had no internet to distract me. Let's just say... the book's dense. But the ideas inside - mind blowing.
Rather than get into the book here, I've created a whole website around it with my notes: thebeginningofinfinity.xyz. Please go read at your leisure.
As an aside, the web app I've created to browse the book is my first foray into a larger project around shortening none-fiction books by publishing high-level cliff notes. This will tie into my note-editing company, Reflect. But more on that later...