The philosophic attitude, being a truth-seeking attitude, never criticizes merely for the sake of criticizing, and never seeks to uncover what is bad in a thing without seeking at the same time to uncover what is good. Its critical judgements are fair, never destructive but always constructive. Whatever it attacks because of the error and evil it contains, it also defends because of the truth and good it contains.
-- Notebooks Category 20: What Is Philosophy? > Chapter 5: The Philosopher > # 117