Such state selected CI (or MCSCF) methods all involve a preset cutoff below which configurations are neglected.
I think your quote is from Forms of Verse, and, since I checked in your previous sentence and determined I am right, I demand extra credit =D I'm feeling lucky. (http://www.online-literature.com/henry_longfellow/923/)
Grab the nearest book.
Open the book to page 123.
Find the fifth sentence. (not counting ones continued from the previous page)
Post the text of the sentence in your own bulletin ... along with these instructions.
Don't search around and look for the "coolest" book you can find. Do what's actually next to you.
Boom Boom CHA : D