" Exactly. We know that the great Goethe carried a copy of Spinoza’s Ethics in his pocket for a year. Imagine that—an entire year! And not only Goethe but many other great Germans. Lessing and Heine reported a clarity and calmness that came from reading this book. Who knows, there may come a time in your life when you, too, will need the calmness and clarity that Spinoza’s Ethics offers. I shan’t ask you to read that book now. You’re too young to grasp its meaning. But I want you to promise that before your twenty-first birthday you will read it. Or perhaps I should say, read it by the time you’re fully grown. Do I have your word as a good German? "

― Irvin D. Yalom , The Spinoza Problem