 Given this explanatory priority of substance, to understand what it means to think or to have a mind we also cannot simply extrapolate from our own case (for example, from introspection, or from observing the behavior of fellow humans). Rather, to understand thought and mindedness we first have to understand the nature of divine thought, i.e., what it means to be an “infinite” – unlimited and self-sufficient – thinker. This is the fundamental case of thinking for Spinoza.