This chapter asks what the main currents in classical Greek philosophy understand by ‘personal religion’. How do they conceive of the beliefs and uplifting they want religious people to display? Do we have the necessary conceptual framework to understand the phenomenon of ‘personal religion’. In the study of ancient Greek religion, philosophers are often revisited to find the clearest analysis of religious concepts, though mainly in terms of the individual integrating norms of civic religion. Yet in many places the philosophers refer to those concepts and virtues in contexts outside civic religion, thus opening a broader understanding of personal religion. In connection with this the chapter also investigates what philosophers mean if they refer to their basic principles as ‘divine’. Do they introduce new divinities? Or are they introducing new ways of dealing with traditional gods? This leads to asking whether philosophical life replaces traditional religion. Very often, this is just assumed to be the case, entailing the corollary point that metaphysics comes to replace religion. Yet a case can be made that philosophers themselves avoided this merging of metaphysics and religion.