" Stay a moment, Alfred. I’ve one last question. Let me ask you to imagine something. Close your eyes and imagine leaving me now. Imagine walking away from our talk, and then imagine sitting on the long train ride to Munich. Let me know when your imagination is there.”
Alfred closed his eyes and soon nodded readiness.
“Now, here’s what I’d like you to do. Think back upon our talk tonight, and ask yourself these questions: Do I have any regrets about my talk with Friedrich? Were there important issues I did not raise?”
Alfred kept his eyes closed and, after a long silence, slowly nodded. “Well, there is one thing . . . "

― Irvin D. Yalom , The Spinoza Problem