Most people would agree that their inner thoughts and feelings are essential to who they are. In our research group we systematically investigate the antecedents and consequences of subjective experiences. When I perform a challenging task, does it improve my performance if I have a subjective experience of effort, or would I accomplish the task equally well without experiencing such a feeling? More recently, we started a new line of research inquiring the role of subjective experience for belief updating (e.g. I am not so sure, therefore there is no need to update my belief). In short, we study the factors that shape what we feel, and how, what we feel, shapes our beliefs.