Intro to Adding and Subtracting Logs (Same Base)

The Pittsburgh Pirates play the St. Louis Cardinals on April 1, 2019 (see here for more info). Let's say the probability of the Pirates winning this game is $P$. Then we define the Go Pirates Metric by the function

$$f(P) = \ln(P) - \ln(1 - P)$$

where we assume $0 < P < 1.$ For which values of $P$ is $f(P)$ negative?