A rich man asked Sen-Gai to write something for the continued prosperity of his family so that it might be treasured from generation to generation.
Sen-Gai obtained a large sheet of paper and wrote: "Father dies, son dies, grandson dies."
The rich man became angry. "I asked you to write something for the happiness of my family! Why do you make such a joke as this?"
"No joke is intended," explained Sen-Gai.
"If before you die your son should die, this would grieve you greatly. If your grandson should pass away before your son, both of you would be broken-hearted. If your family, generation after generation, passes away in the order I have named, it will be the natural course of life. I call this real prosperity."