This text explores the relationship between individual thoughts and philosophical systems, drawing a parallel between thoughts and organs or cells in a living body. The author introduces the concept of a philosopheme to describe an idea that can be effectively utilized in constructing a philosophy. It highlights that while some thoughts are autonomous enough to be integrated into different systems, others require adaptation or remain entirely incompatible. A crucial requirement for building true philosophy (Plato's orthé filosofia) is a refined sensitivity for determining such compatibility. Identifying what constitutes a philosopheme is often only possible retrospectively, after it has been integrated into a philosophical framework. Therefore, it is extremely difficult to pre-emptively dismiss a thought as being unsuitable for any true philosophy. While compatibility alone is not a sufficient condition for the inclusion of an idea, incompatibility serves as an absolute barrier. The text emphasizes the necessity of discernment and intellectual precision in philosophical synthesis.