The Philosophical Spirit is a major concept existing throughout the Millettic philosophical tradition and refers to a set of principles in close association with the development of Millettarian metaphilosophy as well as the reascensionist movement.

 

These principles or guidelines are created as a set of characteristics that are considered to be in alignment with how a philosophy or a philosopher, or someone following a philosophy, should act. These characteristics are most often established in contradistinction to the characteristics of religions and their followers which demonstrates another attempt of Millettism to distance itself from being classified as a religion.

It can be described as a guide for how philosophy should be practiced as well as what may or may not be deemed as philosophical by its nature, character, and behaviour, either in relation to a person, a concept, or an organisation.