How did Miers get picked?

The Washington Post has an interesting article about the process which resulted in the selection of Harriet Miers for the Supreme Court. This last paragraph is the most important.

"He knows by his relationship with her that the Harriet Miers he knows today will be the Harriet Miers 20 years from now," said the senior official, meaning she would be no Souter. "She knows his expectations. She is the kind of person I strongly believe would never put herself in the position to be considered if she wouldn't meet those expectations."

(H/T UTR)