 According to Brentano, psychology plays a central role in the sciences; he considers especially logics, ethics, and aesthetics as practical disciplines that depend on psychology as their theoretical foundation. He collocates these three disciplines in his larger systematic outlook by tying them to the three kinds of mental phenomenon: presentations, judgments, and phenomena of love and hate, i.e., emotions. The “triad of the Beautiful, the True, and the Good ... [is] related to the three aspects of our mental life” (PES, 203). Moreover, the three disciplines essentially build on his views that presentations are intrinsically valuable and that not only judgments, but also emotions can be correct or not correct. 