What is a "theoretical physicist"? http://public.web.cern.ch/public/en/People/Theorists-en.html at CERN Public Web.
Álvaro de Rújula: Frases en inglés
“Science is what we do when we don't know what we're doing.”
Alvaro De Rujula, quoted in "Large Hadron Collider - The Search For The Higgs" http://www.youtube.com/watch?v=_XbKZwXK-3c; this quote can be heard at approximately 3:55 to 4:15 in the video. It is important to note, it could be taken out of context. It implies that science is what we use when we do not know the answer to something.
“What is important is to invent something last, not first.”
Alvaro De Rujula, quoted during CERN Summer Student lecture in 2006.
"What is a "theoretical physicist"?" at CERN Public Web.