The great error of those who discover the relativity of truth, and are so overwhelmed by their discovery that they forget that it must be held together with other discoveries, is to overlook the progressive and evolutionary character of all conceptions of truth. It was so overlooked by the Sceptics' school of metaphysics in ancient Greece and by the Eel Wrigglers' school in ancient India. Life, experience, and reflection are at work in drawing us to higher and ever higher conceptions. Consequently these conceptions are emphatically not equal in value and we are emphatically not to evaluate all as alike. Philosophy does not fall into this error. While readily and fully acknowledging that all outlooks are relatively true at best, at the same time it sets up a distinctive outlook of its own. It shows that there is a definite ascent of progression through all these varying outlooks. They culminate in its own because its own is alone free and flexible, undogmatic and all-comprehensive.
-- Notebooks Category 20: What Is Philosophy? > Chapter 5: The Philosopher > # 246