While announcing a new defense appropriation today, Bush said:
Our enemies are innovative and resourceful, and so are we. They never stop thinking about new ways to harm our country and our people, and neither do we.
You can find the quote in a White House Press Release quoting verbatim what Bush said –
http://www.whitehouse.gov/news/releases/2004/08/20040805-4.html, fourth paragraph from the end. (Link dead, removed 2013-07-07)