This chapter is concerned with the creation of affect Mindset theory. It has already been said that personality theory, both for cognition and affect, is historically fragmented, even if a start has been made towards defragmentation (e.g., Kaschel & Kuhl, 2004; Mischel & Shoda, 1995). We continuing on this path by following theory from Swann et al. (1987) by developing an affect–cognition interactive model that arises through configuration within the framework of cybernetic Cultural Agency Theory. Here, affect and cognition are sub-agencies of personality that interact operatively, where affect/cognition traits are respectively influenced by cognition/affect process of internalisation. We shall develop a trait model for the affect personality that might be called Affect Mindset Theory, symmetrical with the pre-existing Cognition Mindset Theory (Yolles & Fink, 2014, 2014a, 2014b, 2014c). In developing the approach, we have found that it is possible to configure existing suitable temperament theory.