This text explores the concept of truth as a "philosopheme," defined as that which is meant to be thought but remains as yet unthought or only partially understood. The author posits that truth acts as the ultimate criterion for its own intellectual grasp and application. Consequently, any situational conceptualization of truth is perpetually subject to the norm of "truth itself," which demands the ongoing correction and reinterpretation of philosophical thoughts. This unthought truth functions as a normative guide, compelling philosophy to rectify its insights in light of what should have been fully apprehended. Furthermore, the text suggests the need to distinguish Truth, as a unified principle, from the multiplicity of Platonic "ideas," which requires a deeper investigation into the nature of ideas as potentially "non-being." Ultimately, truth is presented not as a static object of knowledge, but as a dynamic, normative force that perpetually steers philosophical inquiry, remaining an inexhaustible horizon that challenges every existing thought to reach beyond its current limitations.