"That's what my life is, writing songs"

John Cale's quote talks to the importance of songwriting in his life. It recommends that songwriting is a huge part of his identity and that it is something he values deeply. It implies that songwriting is a source of happiness and satisfaction for him, and that it is something he puts a lot of effort into. It likewise recommends that songwriting is a method for him to reveal himself and to communicate his ideas and sensations to others. The quote suggests that songwriting is a type of self-expression and a method for him to understand the world around him. It is a method for him to understand his own life and to share his experiences with others. Eventually, the quote suggests that songwriting is an important part of John Cale's life which it is something he cherishes deeply.