Thank you for your interest in the —— position. It was a difficult decision but the position has been filled.
Your résumé was impressive and you are a well-qualified candidate for the —— position. You are a talented individual and have many of the quality character attributes that are needed in the position. You will succeed in whatever endeavor you choose.
Don’t get me wrong, it’s nice to hear back from a prospective employer in general considering that so many organizations will never even let you know if they received your information, but there’s nothing like generic motivation to start your day. Readers, you ARE special.