The paper Mr. Antolini gives Holden says something by Wilhelm Stekel. What does it say?

From the text:

Then he came back and sat down with the paper in his hand. "Oddly enough, this wasn't written by a practicing poet. It was written by a psychoanalyst named Wilhelm Stekel. Here's what he--Are you still with me?"

"Yes, sure I am."

"Here's what he said: 'The mark of the immature man is that he wants to die nobly for a cause, while the mark of the mature man is that he wants to live humbly for one.'"