Hesse is my favorite author https://medium.com/literary-impulse/descortly-poetic-ode-to-the-spiritual-genius-of-hermann-hesse-11799d5833de and this short book is indeed a gem. I titled this post with that quote. https://medium.com/know-thyself-heal-thyself/your-soul-is-the-whole-world-7a149c7602ad

Last year I discovered his first book, Peter Camenzind. It's wonderful. https://medium.com/write-under-the-moon/learning-to-love-by-observing-the-art-of-dying-well-2048b13f71d2

My favorite though is Narcissus and Goldmund. I've read it four times over 40 years. Hermann Hesse, Alan Arkin, and Marcus Meet in a Bar to Discuss Philosophy https://medium.com/the-taoist-online/hermann-hesse-alan-arkin-and-marcus-meet-in-a-bar-to-discuss-philosophy-with-marcus-7582ce0bad14