Once you’re successful with a certain kind of music, it’s hard not to have faith in it as a means to stay successful.

Flack is reflecting on the inertia that success creates: when a particular style or repertoire has brought acclaim, it becomes psychologically and professionally difficult to abandon it. The quote points to a feedback loop in popular music—audiences, labels, and artists themselves come to “believe” in a proven formula, treating it as a reliable path to continued relevance. Implicitly, she also hints at the artistic risk this can impose: faith in what has worked before can discourage experimentation, even for musicians with broad tastes and training. The line captures a tension between creative growth and the market’s preference for repeatable success.