Wish You Were Here is the second Pink Floyd album to use a conceptual theme written entirely by Roger Waters. It reflects his feeling that the camaraderie that had served the band was, by then, largely absent. The album begins with a long instrumental preamble and segues into the lyrics for "Shine On You Crazy Diamond", a tribute to Syd Barrett, whose mental breakdown had forced him to leave the group seven years earlier. Barrett is fondly recalled with lines such as "Remember when you were young, you shone like the sun" and "You reached for the secret too soon, you cried for the moon". Wish You Were Here is also a critique of the music business. "Shine On" crosses seamlessly into "Welcome to the Machine", a song that begins with an opening door (described by Waters as a symbol of musical discovery and progress betrayed by a music industry more interested in greed and success) and ends with a party, the latter epitomising "the lack of contact and real feelings between people". Similarly, "Have a Cigar" scorns record industry "fatcats" with the lyrics repeating a stream of cliches heard by rising new-comers in the industry, and including the question "by the way, which one's Pink?" asked of the band on at least one occasion. The lyrics of the next song, "Wish You Were Here", relate both to Barrett's condition, and to the dichotomy of Waters' character, with greed and ambition battling with compassion and idealism. The album closes with a reprise of "Shine On" and further instrumental excursions.