Jesse James Garrett is a reference in the world of UX and I'm currently reading one of his illustrious additions to the world of UX Design - his book entitled "Elements of User Experience Design".
Seriously! Get the book. Read the book!!! It is great on many levels - and I'm sure the book is out there in different languages - in French too.
Some of the quotes below are from his book and other's from other works.
To find the sources of the quotes below visit the link below.
My favourite quote from the lot is this one:
“Experience design is the design of anything, independent of medium, or across media, with human experience as an explicit outcome, and human engagement as an explicit goal.” – Jesse James Garrett